GMC Yukon (2015 – 2016) – fuse box diagram

Year of production: 2015, 2016

Engine Compartment Fuse Block

The engine compartment fuse block is in the engine compartment, on the driver side of the vehicle.

Item	Usage
1	Electric Running Boards
2	Antilock Brake System Pump
3	Interior BEC LT1
4	MBS Passenger
5	Suspension Leveling Compressor
6	4WD Transfer Case Electronic Control
7	Electric Parking Brake
8	Interior BEC LT2
9	Rear BEC 1
10	MBS Driver
11	ALC Exhaust Solenoid
12	Integrated Chassis Control Module
13	Real Time Dampening
14	Fuel Pump Power Module
17	MBS Driver
21	ALC Exhaust Solenoid
23	Integrated Chassis Control Module
24	Real Time Dampening
25	Fuel Pump Power Module
26	Spare/Battery Regulated Voltage Control
28	Upfitter 2
29	Upfitter 2 Relay
30	Wiper
31	TIM
34	Back-up Lamps
35	Antilock Brake System Valve
36	Trailer Brakes
37	Upfitter 3 Relay
39	Trailer Stop/Turn Right
40	Trailer Stop/ Turn Lef
41	Trailer Park Lamps
42	Right Parking Lamps
43	Left Parking Lamps
44	Upfitter 3
45	Automatic Level Control Run/Crank
47	Upfitter 4
48	Upfitter 4 Relay
49	Reverse Lamps
51	Parking Lamp Relay
59	Euro Trailer
60	Air Conditioning Control
63	Upfitter 1
67	Trailer Battery
69	RC Upfitter 3 and 4
70	VBAT Upfitter 3 and 4
72	Upfitter 1 Relay
74	Engine Control Module Ignition
75	Miscellaneous Ignition Spare
76	Transmission Ignition
77	RC Upfitter 1 and 2
78	VBAT Upfitter 1 and 2
83	Euro Trailer RC
84	Run/Crank Relay
87	Engine
88	Injector A – Odd
89	Injector B – Even
90	Oxygen Sensor B
91	Throttle Control
92	Engine Control Module Relay
93	Horn
94	Fog Lamps
95	High-Beam Headlamps
100	Oxygen Sensor A
101	Engine Control Module
102	Engine Control Module/ Transmission Control Module
103	Auxiliary Interior Heate
104	Starter
107	Aero Shutter
109	Police Upfitter
112	Starter Relay
114	Front Windshield Washer
115	Rear Window Washer
116	Cooling Fan Left
121	Right HID Headlamp
122	Left HID Headlamp
123	Cooling Fan Right

 

Instrument Panel Fuse Block (Left)

The left instrument panel fuse block access door is on the driver side edge of the instrument panel.

Number	Usage
1	Not Used
2	Not Used
3	Not Used
4	Accessory Power Outlet 1
5	Retained Accessory Power/Accessory
6	APO/BATT
7	Universal Garage Door Opener/Inside Rear View Mirror
8	SEO Retained Accessory Powe
9	Not Used
10	Body Control Module 3
11	Body Control Module 5
12	Steering Wheel Controls Backlighting
13	Not Used
14	Not Used
15	Not Used
16	Discrete Logic Ignition Sensor
17	VPM
18	Mirror Window Module
19	Body Control Module 1
20	Front Bolster (if equipped)
21	Not Used
22	Not Used
23	Not Used
24	Heater, Ventilation and Air Conditioning Ignition/Heater, Ventilation and Air Conditioning Auxiliar
25	Instrument Cluster Ignition/Sensing Diagnostic Module Ignition
26	Tilt Column/SEO, Tilt Column Lock 1/SEO
27	Data Link Connector/ Driver Seat Module
28	Passive Entry/Passive Start/Heater, Ventilation and Air Conditioning Battery
29	Content Theft
30	Not Used
31	Not Used
32	Not Used
33	SEO/Automatic Level Contro
34	Park Enable Electric Adjustable Pedal (if equipped)
35	Not Used
36	Miscellaneous R/C
37	Heated Steering Wheel
38	Steering Column Lock 2 (if equipped)
39	Instrument Cluster Battery
40	Not Used
41	Not Used
42	Euro Trailer (if equipped)
43	Left Doors
44	Driver Power Seat
45	Not Used
46	Right Heated/ Cooled Seat
47	Left Heated/ Cooled Seat
48	Not Used
49	Not Used
50	Accessory Power Outlet 2
51	Not Used
52	Retained Accessory Power/Accessory Relay
53	Run/Crank Relay
54	Not Used
55	Not Used
56	Not Used

 

Instrument Panel Fuse Block (Right)

The right instrument panel fuse block access door is on the passenger side edge of the instrument panel.

Number	Usage
1	Not Used
2	Not Used
3	Not Used
4	Accessory Power Outlet 4
5	Not Used
6	Not Used
7	Not Used
8	Glove Box
9	Not Used
10	Not Used
11	Not Used
12	Steering Wheel Controls
13	Body Control Module 8
14	Not Used
15	Not Used
16	Not Used
17	Not Used
18	Not Used
19	Body Control Module 4
20	Rear Seat Entertainment
21	Sunroof
22	Not Used
23	Not Used
24	Not Used
25	Not Used
26	Info/Airbag
27	Spare/RF WDW RN SW
28	Obstacle Detection/USB
29	Radio
30	Not Used
31	Not Used
32	Not Used
33	Not Used
34	Not Used
35	SEO B2
36	SEO
37	Body Control Module 2
38	A/C Inverter
39	Not Used
40	Not Used
41	Not Used
42	Not Used
43	Not Used
44	Right Door Window Motor
45	Front Blower
46	Body Control Module 6
47	Body Control Module 7
48	Amplifier
49	Right Front Seat
50	Accessory Power Outlet 3
51	Not Used
52	Retained Accessory Power/Accessory Relay
53	Not Used
54	Not Used
55	Not Used
56	Not Used

Rear Compartment Fuse Block

The rear compartment fuse block is behind the access panel on the left side of the compartment

ISO Mini Relays	Usage
1	Rear Defogger

Micro Fuses	Usage
2	Heated Second Row Seat Left
3	Heated Second Row Seat Right
4	Heated Mirrors
5	Liftgate
6	Glass Breakage
7	Liftglass
8	Liftgate Module Logic
9	Rear Wiper
10	Rear Heater, Ventilation and Air Conditioning Blower
11	Second Row Seat
19	Rear Fog Lamp (if equipped)

 

M-Type Fuses	Usage
12	Liftgate Module
13	Third Row Seat
14	Rear Accessory Power Outlet
15	Rear Defogger

 

Ultra Micro Relays	Usage
16	Liftgate

 

Micro Relays	Usage
17	Liftgate
18	Rear Fog Lamp (if equipped)
19	Heated Mirrors

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2009 – 2014) – fuse box diagram

Year of production: 2009, 2010, 2011, 2012, 2013, 2014

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Fuses	Usage
1	Rear Seats
2	Rear Accessory Power Outlet
3	Steering Wheel Controls Backlight
4	Driver Door Module
5	Dome Lamps, Driver Side Turn Signal
6	Driver Side Turn Signal, Stoplamp
7	Instrument Panel Back Lighting
8	Passenger Side Turn Signal, Stoplamp
9	Passenger Door Module, Universal Home Remote System
10	Power Door Lock 2 (Unlock Feature)
11	Power Door Lock 2 (Lock Feature
12	Stoplamps, Center-High Mounted Stoplamp
13	Rear Climate Controls
14	Not Used
15	Body Control Module (BCM)
16	Accessory Power Outlets
17	Interior Lamps
18	Power Door Lock 1 (Unlock Feature)
19	Rear Seat Entertainment
20	Ultrasonic Rear Parking Assist, Power Liftgate
21	Power Door Lock 1 (Lock Feature)
22	Driver Information Center (DIC)
23	Rear Wiper
24	Not Used
25	Driver Seat Module, Remote Keyless Entry System
26	Not Used

 

Circuit Breaker	Usage
LT DR	Driver Door Harness Connection

 

Harnerss Connector	Usage
LT DR	Driver Door Harness Connection
BODY	Harness Connector
BODY	Harness Connector

Center Instrument Panel Fuse Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Fuses	Usage
BODY 2	Body Harness Connector 2
BODY 1	Body Harness Connector 1
BODY 3	Body Harness Connector 3
HEADLINER 3	Headliner Harness Connector 3
HEADLINER 2	Headliner Harness Connector 2
HEADLINER 1	Headliner Harness Connector 1
BRAKE CLUTCH	Brake Clutch Harness Connector
SEO/UPFITTER	Special Equipment Option Upfitter Harness Connector

Circuit Breaker	Usage
CB1	Passenger’s Side Power Window Circuit Breaker
CB2	Passenger’s Seat Circuit Breaker
CB3	Driver’s Seat Circuit Breaker
CB4	Rear Sliding Window

Underhood Fuse block

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

Fuses	Usage
1	Right Trailer Stop/Turn Lamp
2	Electronic Stability Suspension Control, Automatic Level Control Exhaust
3	Left Trailer Stop/Turn Lamp
4	Engine Controls
5	Engine Control Module, Throttle Control
6	Trailer Brake Controller
7	Front Washer
8	Oxygen Sensors
9	Anti-lock Brakes System 2
10	Trailer Back-up Lamps
11	Driver’s Side Low-Beam Headlamp
12	Engine Control Module (Battery)
13	Fuel Injectors, Ignition Coils (Right Side)
14	Transmission Control Module (Battery)
15	Vehicle Back-up Lamps
16	Passenger’s Side Low-Beam Headlamp
17	Air Conditioning Compressor
18	Oxygen Sensors
19	Transmission Controls (Ignition)
20	Fuel Pump
21	Fuel System Control Module
22	Headlamp Washers
23	Rear Windshield Washer
24	Fuel Injectors, Ignition Coils (Left Side)
25	Trailer Park Lamps
26	Driver Park Lamps
27	Passenger Side Park Lamps
28	Fog Lamps
29	Horn
30	Passenger’s Side High-Beam Headlamp
31	Daytime Running Lamps
32	Driver’s Side High-Beam Headlamp
33	Daylight Running Lamps 2
34	Sunroof
35	Key Ignition System, Theft Deterrent System
36	Windshield Wiper
37	SEO B2 Upfitter Usage (Battery)
38	Electric Adjustable Pedals
39	Climate Controls (Battery)
40	Airbag System (Ignition)
41	Amplifier
42	Audio System
43	Miscellaneous (Ignition), Rear Vision Camera, Cruise Control
44	Liftgate Release
45	Airbag System (Battery)
46	Instrument Panel Cluster
47	Power Take-Off
48	Auxiliary Climate Control (Ignition), Compass-Temperature Mirror
49	Center High-Mounted Stoplamp (CHMSL)
50	Rear Defogger
51	Heated Mirrors
52	SEO B1 Upfitter Usage (Battery)
53	Cigarette Lighter, Auxiliary Power Outlet
54	Automatic Level Control Compressor Relay, SEO Upfitter Usage
55	Climate Controls (Ignition)
56	Engine Control Module, Secondary Fuel Pump (Ignition)

J-Case Fuses	Usage
60	Cooling Fan 1
61	Antilock Brake System 1
62	Starter
63	Stud 2 (Trailer Brakes)
64	Left Bussed Electrical Center 1
65	Electric Running Boards
66	Heated Windshield Washer System
67	Four-Wheel Drive System
68	Stud 1 (Trailer Connector Battery Power)
69	Mid-Bussed Electrical Center 1
70	Climate Control Blower
71	Power Liftgate Module
72	Left Bussed Electrical Center 2

Relays	Usage
FAN HI	Cooling Fan High Speed
FAN LO	Cooling Fan Low Speed
ENG EXH VLV	Not Used
FAN CNTRL	Cooling Fan Control
HDLP LO/HID	Low-Beam Headlamp
FOG LAMP	Front Fog Lamps
A/C CMPRSR	Air Conditioning Compressor
STRTR	Starte
PWR/TRN	Powertrain
FUEL PMP	Fuel Pump
PRK LAMP	Parking Lamps
REAR DEFOG	Rear Defogge
RUN/CRANK	Switched Power

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2008) – fuse box diagram

Year of production: 2008

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Fuses	Usage
1	Rear Seats
2	Rear Accessory Power Outlet
3	Steering Wheel Controls Backlight
4	Driver Door Module
5	Dome Lamps, Driver Side Turn Signal
6	Driver Side Turn Signal, Stoplamp
7	Instrument Panel Back Lighting
8	Passenger Side Turn Signal, Stoplamp
9	Passenger Door Module, Universal Home Remote System
10	Power Door Lock 2 (Unlock Feature)
11	Power Door Lock 2 (Lock Feature
12	Stoplamps, Center-High Mounted Stoplamp
13	Rear Climate Controls
14	Not Used
15	Body Control Module (BCM)
16	Accessory Power Outlets
17	Interior Lamps
18	Power Door Lock 1 (Unlock Feature)
19	Rear Seat Entertainment
20	Ultrasonic Rear Parking Assist, Power Liftgate
21	Power Door Lock 1 (Lock Feature)
22	Driver Information Center (DIC)
23	Rear Wiper
24	Not Used
25	Driver Seat Module, Remote Keyless Entry System
26	Not Used

 

Harnerss Connector	Usage
LT DR	Driver Door Harness Connection
BODY	Harness Connector
BODY	Harness Connector

Center Instrument Panel Fuse Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Fuses	Usage
BODY 2	Body Harness Connector 2
BODY 1	Body Harness Connector 1
BODY 3	Body Harness Connector 3
HEADLINER 3	Headliner Harness Connector 3
HEADLINER 2	Headliner Harness Connector 2
HEADLINER 1	Headliner Harness Connector 1
BRAKE CLUTCH	Brake Clutch Harness Connector
SEO/UPFITTER	Special Equipment Option Upfitter Harness Connector

 

Circuit Breaker	Usage
CB1	Passenger’s Side Power Window Circuit Breaker
CB2	Passenger’s Seat Circuit Breaker
CB3	Driver’s Seat Circuit Breaker
CB4	Rear Sliding Window

Underhood Fuse block

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

Fuses	Usage
1	Right Trailer Stop/Turn Lamp
2	Electronic Stability Suspension Control, Automatic Level Control Exhaust
3	Left Trailer Stop/Turn Lamp
4	Engine Controls
5	Engine Control Module, Throttle Control
6	Trailer Brake Controller
7	Front Washer
8	Oxygen Sensors
9	Anti-lock Brakes System 2
10	Trailer Back-up Lamps
11	Driver’s Side Low-Beam Headlamp
12	Engine Control Module (Battery)
13	Fuel Injectors, Ignition Coils (Right Side)
14	Transmission Control Module (Battery)
15	Vehicle Back-up Lamps
16	Passenger’s Side Low-Beam Headlamp
17	Air Conditioning Compressor
18	Oxygen Sensors
19	Transmission Controls (Ignition)
20	Fuel Pump
21	Fuel System Control Module
22	Headlamp Washers
23	Rear Windshield Washer
24	Fuel Injectors, Ignition Coils (Left Side)
25	Trailer Park Lamps
26	Driver Park Lamps
27	Passenger Side Park Lamps
28	Fog Lamps
29	Horn
30	Passenger’s Side High-Beam Headlamp
31	Daytime Running Lamps
32	Driver’s Side High-Beam Headlamp
33	Daylight Running Lamps 2
34	Sunroof
35	Key Ignition System, Theft Deterrent System
36	Windshield Wiper
37	SEO B2 Upfitter Usage (Battery)
38	Electric Adjustable Pedals
39	Climate Controls (Battery)
40	Airbag System (Ignition)
41	Amplifier
42	Audio System
43	Miscellaneous (Ignition), Rear Vision Camera, Cruise Control
44	Liftgate Release
45	Airbag System (Battery)
46	Instrument Panel Cluster
47	Power Take-Off
48	Auxiliary Climate Control (Ignition), Compass-Temperature Mirror
49	Center High-Mounted Stoplamp (CHMSL)
50	Rear Defogger
51	Heated Mirrors
52	SEO B1 Upfitter Usage (Battery)
53	Cigarette Lighter, Auxiliary Power Outlet
54	Automatic Level Control Compressor Relay, SEO Upfitter Usage
55	Climate Controls (Ignition)
56	Engine Control Module, Secondary Fuel Pump (Ignition)

 

J-Case Fuses	Usage
60	Cooling Fan 1
61	Antilock Brake System 1
62	Starter
63	Stud 2 (Trailer Brakes)
64	Left Bussed Electrical Center 1
65	Electric Running Boards
66	Heated Windshield Washer System
67	Four-Wheel Drive System
68	Stud 1 (Trailer Connector Battery Power)
69	Mid-Bussed Electrical Center 1
70	Climate Control Blower
71	Power Liftgate Module
72	Left Bussed Electrical Center 2

Relays	Usage
FAN HI	Cooling Fan High Speed
FAN LO	Cooling Fan Low Speed
ENG EXH VLV	Not Used
FAN CNTRL	Cooling Fan Control
HDLP LO/HID	Low-Beam Headlamp
FOG LAMP	Front Fog Lamps
A/C CMPRSR	Air Conditioning Compressor
STRTR	Starte
PWR/TRN	Powertrain
FUEL PMP	Fuel Pump
PRK LAMP	Parking Lamps
REAR DEFOG	Rear Defogge
RUN/CRANK	Switched Power

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2007) – fuse box diagram

Year of production: 2007

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

 

Name	Usage
LT DR	Driver’s Door Harness Connection
LT DR	Driver’s Side Power Window Circuit Breaker
REAR SEAT	Rear Seats
AUX PWR2	Rear Cargo Area Power Outlets
SWC BKLT	Steering Wheel Controls Backlight
DDM	Driver Door Module
CTSY	Dome Lamps, Driver’s Side Turn Signal
LT STOP TRN	Driver’s Side Turn Signal, Stoplamp
DIM	Instrument Panel Back Lighting
RT STOP TRN	Passenger’s Side Turn Signal, Stoplamp
BCM	Body Control Module
UNLCK2	Power Door Lock 2 (Unlock Feature)
LCK2	Power Door Lock 2 (Lock Feature)
STOP LAMPS	Stoplamps, Center-High Mounted Stoplamp
REAR HVAC	Rear Climate Controls
PDM	Passenger Door Module, Universal Home Remote System
AUX PWR	Accessory Power Outlets
IS LPS	Interior Lamps
UNLCK1	Power Door Lock 1 (Unlock Feature)
OBS DET	Ultrasonic Rear Parking Assist, Power Liftgate
LCK1	Power Door Lock 1 (Lock Feature)
REAR WPR	Rear Wiper
COOLED SEATS	Not Used
DSM	Driver Seat Module, Remote Keyless Entry System
BODY	Harness Connector
BODY	Harness Connector

Center Instrument Panel Fuse Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Fuses	Usage
BODY 2	Body Harness Connector 2
BODY 1	Body Harness Connector 1
BODY 3	Body Harness Connector 3
HEADLINER 3	Headliner Harness Connector 3
HEADLINER 2	Headliner Harness Connector 2
HEADLINER 1	Headliner Harness Connector 1
BRAKE CLUTCH	Brake Clutch Harness Connector
SEO/UPFITTER	Special Equipment Option Upfitter Harness Connector

 

Circuit Breaker	Usage
CB1	Passenger’s Side Power Window Circuit Breaker
CB2	Passenger’s Seat Circuit Breaker
CB3	Driver’s Seat Circuit Breaker
CB4	Not Used

Underhood Fuse block

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

 

Fuses	Usage
1	Not Used
2	Electronic Stability Suspension Control, Automatic Level Control Exhaust
3	Left Trailer Stop/Turn Lamp
4	Engine Controls
5	Engine Control Module, Throttle Contro
6	Right Trailer Stop/Turn Lamp
7	Front Washer
8	Oxygen Sensors
9	Anti-lock Brakes System 2
10	Trailer Back-up Lamps
11	Driver’s Side Low-Beam Headlamp
12	Engine Control Module (Battery)
13	Fuel Injectors, Ignition Coils (Right Side)
14	Transmission Control Module (Battery)
15	Vehicle Back-up Lamps
16	Passenger’s Side Low-Beam Headlamp
17	Air Conditioning Compressor
18	Oxygen Sensors
19	Transmission Controls (Ignition)
20	Fuel Pump
21	Not Used
22	Rear Washer
23	Fuel Injectors, Ignition Coils (Left Side
24	Trailer Park Lamps
25	Driver’s Side Park Lamps
26	Passenger’s Side Park Lamps
27	Fog Lamps
28	Horn
29	Passenger’s Side High-Beam Headlamp
30	Daytime Running Lamps
31	Driver’s Side High-Beam Headlamp
32	Daylight Running Lamps 2
33	Sunroof
34	Key Ignition System, Theft Deterrent System
35	Windshield Wiper
36	SEO B2 Upfitter Usage (Battery)
37	Electric Adjustable Pedals
38	Climate Controls (Battery)
39	Airbag System (Ignition)
40	Amplifier
41	Audio System
42	Four-Wheel Drive
43	Miscellaneous (Ignition), Rear Vision Camera, Cruise Control
44	Liftgate Release
45	OnStar®, Rear Seat Entertainment Display
46	Instrument Panel Cluster
47	Not Used
48	Not Used
49	Auxiliary Climate Control (Ignition), Compass-Temperature Mirror
50	Rear Defogger
51	Airbag System (Battery)
52	SEO B1 Upfitter Usage (Battery)
53	Cigarette Lighter, Auxiliary Power Outlet
54	Automatic Level Control Compressor Relay, SEO Upfitter Usage
55	Climate Controls (Ignition)
56	Engine Control Module, Secondary Fuel Pump (Ignition)

 

J-Case Fuses	Usage
60	Cooling Fan 1
61	Automatic Level Control Compressor
62	Heavy Duty Anti-lock Brake System
63	Cooling Fan 2
64	Anti-lock Brake System 1
65	Starter
66	Stud 2 (Trailer Brakes)
67	Left Bussed Electrical Center 1
68	Electric Running Boards
69	Heated Windshield Washer System
70	Four-Wheel Drive System
71	Stud 1 (Trailer Connector Battery Power)
72	Mid-Bussed Electrical Center 1
73	Climate Control Blower
74	Power Liftgate Module
75	Left Bussed Electrical Center 2

Relays	Usage
FAN HI	Cooling Fan High Speed
FAN LO	Cooling Fan Low Speed
ENG EXH VLV	Not Used
FAN CNTRL	Cooling Fan Control
HDLP LO/HID	Low-Beam Headlamp
FOG LAMP	Front Fog Lamps
A/C CMPRSR	Air Conditioning Compressor
STRTR	Starte
PWR/TRN	Powertrain
FUEL PMP	Fuel Pump
PRK LAMP	Parking Lamps
REAR DEFOG	Rear Defogge
RUN/CRANK	Switched Power

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2005 – 2006) – fuse box diagram

Year of production: 2005, 2006

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Name	Usage
RR Wiper	Rear Window Wiper Switch
SEO ACCY	Special Equipment Option Accessory
WS WPR	Windshield Wipers
TBC ACCY	Truck Body Controller Accessory
IGN 3	Ignition, Heated Seats
4WD	Four-Wheel Drive System, Auxiliary Battery
HTR A/C	Climate Control System
LOCK	Power Door Lock Relay (Lock Function)
HVAC 1	Inside Rearview Mirror, Climate Control System
L DOOR	Driver’s Door Harness Connection
CRUISE	Cruise Control
UNLOCK	Power Door Lock Relay (Unlock Function)
RR FOG LP	Rear Fog Lamp (Export Only)
BRAKE	Anti-Lock Brake System
DRIVER UNLOCK	Power Door Lock Relay (Driver’s Door Unlock Function)
IGN 0	PCM, TCM
TBC IGN 0	Truck Body Controller
VEH CHMSL	Vehicle and Trailer High Mounted Stoplamp
LT TRLR ST/TRN	Left Turn Signal/Stop Trailer
LT TRN	Left Turn Signals and Sidemarkers
VEH STOP	Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module
RT TRLR ST/TRN	Right Turn Signal/Stop Trailer
RT TRN	Right Turn Signals and Sidemarkers
BODY	Harness Connector
DDM	Driver Door Module
AUX PWR 2	Rear Cargo Area Power Outlets
LOCKS	Power Door Lock System
ECC	Rear Electronic Climate Control
TBC 2C	Truck Body Controller
FLASH	Flasher Module
CB LT DOORS	Left Power Window Circuit Breaker
TBC 2B	Truck Body Controlle
TBC 2A	Truck Body Controlle

Center Instrument Panel Utility Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Relay name	Usage
SEO	Special Equipment Option
TRAILER	Trailer Brake Wiring
UPFIT	Upfitter (Not Used)
SL RIDE	Ride Control Harness Connection
HDLR 2	Headliner Wiring Connector
BODY	Body Wiring Connector
DEFOG	Rear Defogger Relay
HDLNR 1	Headliner Wiring Connector 1
SPARE RELAY	Not Used
CB SEAT	Driver and Passenger Seat Module Circuit Breaker
CB RT DOOR	Right Power Window Circuit Breaker
SPARE	Not Used
INFO	Infotainment Harness Connection

Underhood Fuse block

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

*1 — Gasoline Engine and Fuel Injection Rail #2.

*2 — Gasoline Engine and Fuel Injection Rail #1.

*3 — Gasoline Engine; Oxygen Sensors.

*4 — Gasoline Engine; Oxygen Sensors.

*5 — PCM Ignition

Name	Circuit protected
GLOW PLUG	Not Used
CUST FEED	Gasoline Accessory Power
STUD #1	Auxiliary Power (Single Battery and Diesels Only)/Dual Battery (TP2) Do not install fuse
MBEC	Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors
BLOWER	Front Climate Control Fan
LBEC	Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet—Rear Cargo Area and Instrument Panel
STUD 2	Accessory Power/Trailer Wiring Brake Feed
ABS	Anti-Lock Brakes
VSES/ECAS	Vehicle Stability
IGN A	Ignition Power
IGN B	Ignition Power
LBEC 1	Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module
TRL PARK	Parking Lamps Trailer Wiring
RR PARK	Right Rear Parking and Sidemarker Lamps
LR PARK	Left Rear Parking and Sidemarker Lamps
PARK LP	Parking Lamps Rela
STARTER	Starter Relay
INTPARK	Interior Lamps
STOP LP	Stoplamps
TBC BATT	Truck Body Controller Battery Feed
SUNROOF	Sunroof
SEO B2	Off-Road Lamps
4WS	Vent Solenoid Canister/Quadrasteer Module Power
RR HVAC	Rear Climate Control
AUX PWR	Auxiliary Power Outlet — Console
IGN 1	Ignition Relay
PCM 1	Powertrain Control Module
ETC/ECM	Electronic Throttle Control, Electronic Brake Controlle
IGN E	Instrument Panel Cluster, Air Conditioning Relay, Turn Signal/Hazard Switch, Starter Relay
RTD	Ride Control
TRL B/U	Backup Lamps Trailer Wiring
PCM B	Powertrain Control Module, Fuel Pump
F/PMP	Fuel Pump (Relay)
B/U LP	Back-up Lamps, Automatic Transmission Shift Lock Control System
RR DEFOG	Rear Window Defogger
HDLP-HI	Headlamp High Beam Relay
PRIME	Not Used
SIR	Supplemental Inflatable Restraint System
FRT PARK	Front Parking Lamps, Sidemarker Lamps
DRL	Daytime Running Lamps (Relay)
SEO IGN	Rear Defog Relay
TBC IGN1	Truck Body Controller Ignition
HI HDLP-LT	High Beam Headlamp-Left
LH HID	Not Used
DRL	Daytime Running Lamps
IPC/DIC	Instrument Panel Cluster/Driver Information Center
HVAC/ECAS	Climate Control Controller
CIG LTR	Cigarette Lighter
HI HDLP-RT	High Beam Headlamp-Right
HDLP-LOW	Headlamp Low Beam Relay
A/C COMP	Air Conditioning Compressor
A/C COMP	Air Conditioning Compressor Relay
RR WPR	Rear Wiper/Washer
RADIO	Audio System
SEO B1	Mid Bussed Electrical Center, HomeLink, Rear Heated Seats
LO HDLP-LT	Headlamp Low Beam-Left
BTSI	Brake Transmission Shift Interlock System
CRANK	Starting System
LO HDLP-RT	Headlamp Low Beam-Right
FOG LP	Fog Lamp Relay
FOG LP	Fog Lamps
HORN	Horn Relay
W/S WASH	Windshield and Rear Window Washer Pump Relay
W/S WASH	Windshield and Rear Window Washer Pump
INFO	OnStar/Rear Seat Entertainment
RADIO AMP	Radio Amplifier
RH HID	Not Used
EAP	Electric Adjustable Pedal
TREC	All-Wheel Drive Module
SBA	Supplemental Brake Assist

Auxiliary Electric Cooling Fan Fuse Block

The auxiliary electric cooling fan fuse block is located in the engine compartment on the driver’s side of the vehicle next to the underhood fuse block.

Fuses	Usage
COOL/FAN	Cooling Fan
COOL/FAN	Cooling Fan Relay Fuse
COOL/FAN	Cooling Fan Fuse

 

Relays	Usage
COOL/FAN 1	Cooling Fan Relay 1
COOL/FAN 3	Cooling Fan Relay 3
COOL/FAN 2	Cooling Fan Relay 2

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2003 – 2004) – fuse box diagram

Year of production: 2003, 2004

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Name	Usage
RR Wiper	Rear Window Wiper Switch
SEO ACCY	Special Equipment Option Accessory
WS WPR	Windshield Wipers
TBC ACCY	Truck Body Controller Accessory
IGN 3	Ignition, Heated Seats
4WD	Four-Wheel Drive System, Auxiliary Battery
HTR A/C	Climate Control System
LOCK	Power Door Lock Relay (Lock Function)
HVAC 1	Inside Rearview Mirror, Climate Control System
L DOOR	Driver’s Door Harness Connection
CRUISE	Cruise Control
UNLOCK	Power Door Lock Relay (Unlock Function)
RR FOG LP	Rear Fog Lamp (Export Only)
BRAKE	Anti-Lock Brake System
DRIVER UNLOCK	Power Door Lock Relay (Driver’s Door Unlock Function)
IGN 0	PCM, TCM
TBC IGN 0	Truck Body Controller
VEH CHMSL	Vehicle and Trailer High Mounted Stoplamp
LT TRLR ST/TRN	Left Turn Signal/Stop Trailer
LT TRN	Left Turn Signals and Sidemarkers
VEH STOP	Vehicle Stoplamps, Brake Module, Electronic Throttle Control Module
RT TRLR ST/TRN	Right Turn Signal/Stop Trailer
RT TRN	Right Turn Signals and Sidemarkers
BODY	Harness Connector
DDM	Driver Door Module
AUX PWR 2	Rear Cargo Area Power Outlets
LOCKS	Power Door Lock System
ECC	Rear Electronic Climate Control
TBC 2C	Truck Body Controller
FLASH	Flasher Module
CB LT DOORS	Left Power Window Circuit Breaker
TBC 2B	Truck Body Controlle
TBC 2A	Truck Body Controlle

Center Instrument Panel Utility Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Relay name	Usage
SEO	Special Equipment Option
TRAILER	Trailer Brake Wiring
UPFIT	Upfitter (Not Used)
SL RIDE	Ride Control Harness Connection
HDLR 2	Headliner Wiring Connector
BODY	Body Wiring Connector
DEFOG	Rear Defogger Relay
HDLNR 1	Headliner Wiring Connector 1
SPARE RELAY	Not Used
CB SEAT	Driver and Passenger Seat Module Circuit Breaker
CB RT DOOR	Right Power Window Circuit Breaker
SPARE	Not Used
INFO	Infotainment Harness Connection

Underhood Fuse block

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

*1 — Gasoline Engine and Fuel Injection Rail #2.

*2 — Gasoline Engine and Fuel Injection Rail #1.

*3 — Gasoline Engine; Oxygen Sensors.

*4 — Gasoline Engine; Oxygen Sensors.

*5 — PCM Ignition

Name	Circuit protected
GLOW PLUG	Not Used
CUST FEED	Gasoline Accessory Power
STUD #1	Auxiliary Power (Single Battery and Diesels Only)/Dual Battery (TP2) Do not install fuse
MBEC	Mid Bussed Electrical Center Power Feed, Front Seats, Right Doors
BLOWER	Front Climate Control Fan
LBEC	Left Bussed Electrical Center, Door Modules, Door Locks, Auxiliary Power Outlet—Rear Cargo Area and Instrument Panel
STUD 2	Accessory Power/Trailer Wiring Brake Feed
ABS	Anti-Lock Brakes
VSES/ECAS	Vehicle Stability
IGN A	Ignition Power
IGN B	Ignition Power
LBEC 1	Left Bussed Electrical Center, Left Doors, Truck Body Controller, Flasher Module
TRL PARK	Parking Lamps Trailer Wiring
RR PARK	Right Rear Parking and Sidemarker Lamps
LR PARK	Left Rear Parking and Sidemarker Lamps
PARK LP	Parking Lamps Rela
STARTER	Starter Relay
INTPARK	Interior Lamps
STOP LP	Stoplamps
TBC BATT	Truck Body Controller Battery Feed
SUNROOF	Sunroof
SEO B2	Off-Road Lamps
4WS	Vent Solenoid Canister/Quadrasteer Module Power
RR HVAC	Rear Climate Control
AUX PWR	Auxiliary Power Outlet — Console
IGN 1	Ignition Relay
PCM 1	Powertrain Control Module
ETC/ECM	Electronic Throttle Control, Electronic Brake Controlle
IGN E	Instrument Panel Cluster, Air Conditioning Relay, Turn Signal/Hazard Switch, Starter Relay
RTD	Ride Control
TRL B/U	Backup Lamps Trailer Wiring
PCM B	Powertrain Control Module, Fuel Pump
F/PMP	Fuel Pump (Relay)
B/U LP	Back-up Lamps, Automatic Transmission Shift Lock Control System
RR DEFOG	Rear Window Defogger
HDLP-HI	Headlamp High Beam Relay
PRIME	Not Used
SIR	Supplemental Inflatable Restraint System
FRT PARK	Front Parking Lamps, Sidemarker Lamps
DRL	Daytime Running Lamps (Relay)
SEO IGN	Rear Defog Relay
TBC IGN1	Truck Body Controller Ignition
HI HDLP-LT	High Beam Headlamp-Left
LH HID	Not Used
DRL	Daytime Running Lamps
IPC/DIC	Instrument Panel Cluster/Driver Information Center
HVAC/ECAS	Climate Control Controller
CIG LTR	Cigarette Lighter
HI HDLP-RT	High Beam Headlamp-Right
HDLP-LOW	Headlamp Low Beam Relay
A/C COMP	Air Conditioning Compressor
A/C COMP	Air Conditioning Compressor Relay
RR WPR	Rear Wiper/Washer
RADIO	Audio System
SEO B1	Mid Bussed Electrical Center, HomeLink, Rear Heated Seats
LO HDLP-LT	Headlamp Low Beam-Left
BTSI	Brake Transmission Shift Interlock System
CRANK	Starting System
LO HDLP-RT	Headlamp Low Beam-Right
FOG LP	Fog Lamp Relay
FOG LP	Fog Lamps
HORN	Horn Relay
W/S WASH	Windshield and Rear Window Washer Pump Relay
W/S WASH	Windshield and Rear Window Washer Pump
INFO	OnStar/Rear Seat Entertainment
RADIO AMP	Radio Amplifier
RH HID	Not Used
EAP	Electric Adjustable Pedal
TREC	All-Wheel Drive Module
SBA	Supplemental Brake Assist

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2002) – fuse box diagram

Year of production: 2002

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Name	Usage
HVAC 1	Climate Control System
IGN 3	Ignition, Power Seats
BRAKE	Anti-Lock Brake System
HTR A/C	Climate Control System
IGN 0	PRND321 Display, Odometer, PCM
CRUISE	Cruise Control, Instrument Cluster
4WD	Four-Wheel Drive System, Auxiliary Battery
TURN	Exterior Lamps, Turn Signals, Hazard Lamps
RR WIPER	Rear Window Wiper
WS WPR	Windshield Wipers
SEO IGN	Special Equipment Option, Ignition, OnStar
ILLUM	Interior Lamps
IGN 1	Ignition, Instrument Panel
SEO ACCY	Special Equipment Option Accessory, Cellular Telephone
L BODY	Retained Accessory Power Relay
CRANK	Starting System
AIR BAG	Air Bag
MIR/LOCK	Power Mirrors, Power Door Locks
SEAT	Power Seat Circuit Breaker
DR LOCK	Power Door Locks
RAP #1	Retained Accessory Power Relay
LOCK	Power Door Locks
INT PRK	Interior Lamps
UNLOCK	Power Door Locks
DRV UNLOCK	Power Door Lock Relay
L DOOR	Power Door Lock Relay
PWR WDO	Power Window Circuit Breaker
RDO I	Audio System, OnStar
RAP #2	Rear Power Windows, Sunroof, Radio, OnStar
LOCK	Power Door Lock Rela
UNLOCK	Power Door Lock Rela

Center Instrument Panel Utility Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Relay name	Usage
SEO	Special Equipment Option
HTD ST	Heated Seats
SPARE	Not used
VANITY	Headliner Wiring
TRAILER	Trailer Brake Wiring
PWR ST	Power Seats
SPARE	Not Used
UPF	Upfitter
PARK LAMP	Parking Lamps (Relay)
FRT PRK EXPT*	Not Used
SPARE 2	Not Used
PUDDLE LP	Puddle Lamps
SL RIDE	Not Used
SPARE 3	Not Used
INADV PWR	Interior Lights Feed (Relay)
CTSY LP	Courtesy Lamps (Relay)
CEL PHONE	Cellular Telephone Wiring

Underhood Fuse/Relay Center

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

Name	Circuit protected
STUD #1	Accessory Power/Trailer Wiring Feed/Load Leveling
ABS	Anti-Lock Brakes
IGN A	Ignition Switch
AIR	A.I.R. System
RAP #1	Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s)
IGN B	Ignition Switch
RAP #2	Retained Accessory Power/Rear Power Windows, Sunroof, Radio
STUD #2	Accessory Power/Trailer Wiring Brake Feed
TRL R TRN	Right Turn Signal Trailer Wiring
TRL L TRN	Left Turn Signal Trailer Wiring
IGN 1	Ignition, Fuel Controls
INJ B	Ignition, Fuel Controls (Relay)
STARTER	Starter (Relay)
PARK LP	Parking Lamps
FRT HVAC	Climate Control System
STOP LP	Exterior Lamps, Stoplamps
ECM 1	VCM/PCM
CHMSL	Center High Mounted Stoplamp
VEH STOP	Stoplamps, Cruise Control
TRL B/U	Backup Lamps Trailer Wiring
INJ A	Fuel Controls, Ignition
RR HVAC	Rear HVAC
VEH B/U	Vehicle Backup Lamps
ENG 1	Engine Controls, Canister Purge, Fuel System
ETC	Electronic Throttle Control
IGN E	A/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A.I.R. System
B/U LP	Backup Lamps, Automatic Transmission Shift Lock Control System
ATC	Automatic Transfer Case
RR DEFOG	Rear Window Defogger, Heated Mirrors (Relay)
RTD	Autoride (Real Time Damping)
RR PRK	Right Rear Parking Lamps
ECM B	VCM/PCM
F/PMP	Fuel Pump (Relay)
O2 A	Oxygen Sensors
O2 B	Oxygen Sensors
LR PRK	Left Rear Parking Lamps
RR DEFOG	Rear Window Defogger, Heated Mirrors
HDLP	Headlamps (Relay)
TRL PRK	Parking Lamps Trailer Wiring
PRIME	Not Used
RT HDLP	Right Headlamps
DRL	Daytime Running Lamps (Relay)
HTD MIR	Heated Mirrors
LT HDLP	Left Headlamps
A/C	Air Conditioning
AUX PWR	Cigarette Lighter, Auxiliary Power Outlets
SEO 2	Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp
SEO 1	Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone
DRL	Daytime Running Lamps
A/C	A/C (Relay)
FOG LP	Fog Lamps
FOG LP	Fog Lamps (Relay)
RADIO	Audio System, Instrument Cluster, Climate Control System
CIGAR	Cigarette Lighter, Auxiliary Power Outlets
RT TURN	Right Turn Signals
BTSI	Automatic Transmission Shift Lock Control System
LT TURN	Left Turn Signals
FR PRK	Front Parking Lamps, Sidemarker Lamps
W/W PMP	Windshield Washer Pump
HORN	Horn (Relay)
IGN C	Ignition Switch, Fuel Pump, PRND321 Display, Crank
RDO AMP	Radio Amplifier
HAZ LP	Exterior Lamps, Hazard Lamps
EXP LPS	Not Used
HORN	Horn
CTSY LP	Interior Lamps
RR WPR	Rear Wipers
TBC	Body Control Module, Remote Keyless Entry, Headlamps

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (2000 – 2001) – fuse box diagram

Year of production: 2000, 2001

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Name	Usage
L BODY	Retained Accessory Power Relay
LOCK	Power Door Locks
DRV UNLOCK	Power Door Lock Relay
LOCK	Power Door Lock Relay
HVAC 1	Climate Control System
CRUISE	Cruise Control, Instrument Cluster
IGN 3	Ignition, Power Seats
4WD	Four-Wheel Drive System, Auxiliary Battery
CRANK	Starting System
INT PRK	Parking Lamps, Sidemarker Lamps, Interior Lamps
L DOOR	Power Door Lock Relay
BRAKE	Anti-Lock Brake System
RR WIPER	Rear Window Wiper
ILLUM	Interior Lamps
SEAT	Power Seat Circuit Breaker
TURN	Exterior Lamps, Turn Signals, Hazard Lamps
UNLOCK	UNLOCK
HTR A/C	Climate Control System
WS WPR	Windshield Wipers
IGN 1	Ignition, Instrument Panel
AIR BAG	Air Bag
MIR/LOCK	Power Mirrors, Power Door Locks
DR LOCK	Power Door Locks
PWR WDO	Power Window Circuit Breaker
UNLOCK	UNLOCK
IGN 0	PRND321 Display, Odometer, VCM/PCM
SEO IGN	Special Equipment Option, Ignition
SEO ACCY	Special Equipment Option Accessory, Cellular Telephone
RAP #1	Retained Accessory Power Relay
RDO 1	Audio System
RAP #2	Rear Power Windows, Sunroof, Radio

Center Instrument Panel Utility Block

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column.

Relay name	Usage
SEO	Special Equipment Option
HTD ST	Heated Seats
HDLNR	Headliner
VANITY	Headliner Wiring
TRAILER	Trailer Brake Wiring
PWR ST	Power Seats
YE9	Not Used
UPF	Upfitter
PARK LAMP	Parking Lamps
FRT PRK EXPT	Not Used
SPARE 2	Not Used
PUDDLE LP	Not Used
SL RIDE	Not Used
SPARE 3	Not Used
INADV PWR	Interior Lights Feed
CTSY LP	Courtesy Lamps
CEL PHONE	Cellular Telephone Wiring

Underhood Fuse/Relay Center

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

Name	Circuit protected
STUD #1	Accessory Power/Trailer Wiring Feed/Load Leveling
ABS	Anti-Lock Brakes
IGN A	Ignition Switch
AIR	A.I.R. System
RAP #1	Retained Accessory Power, Power Mirrors, Power Door Locks, Power Seat(s)
IGN B	Ignition Switch
RAP #2	Retained Accessory Power/Rear Power Windows, Sunroof, Radio
STUD #2	Accessory Power/Trailer Wiring Brake Feed
TRL R TRN	Right Turn Signal Trailer Wiring
TRL L TRN	Left Turn Signal Trailer Wiring
IGN 1	Ignition, Fuel Controls
INJ B	Ignition, Fuel Controls (Relay)
STARTER	Starter (Relay)
PARK LP	Parking Lamps
FRT HVAC	Climate Control System
STOP LP	Exterior Lamps, Stoplamps
ECM 1	VCM/PCM
CHMSL	Center High Mounted Stoplamp
VEH STOP	Stoplamps, Cruise Control
TRL B/U	Backup Lamps Trailer Wiring
INJ A	Fuel Controls, Ignition
RR HVAC	Rear HVAC
VEH B/U	Vehicle Backup Lamps
ENG 1	Engine Controls, Canister Purge, Fuel System
ETC	Electronic Throttle Control
IGN E	A/C Compressor Relay, Rear Window Defogger, Daytime Running Lamps, A.I.R. System
B/U LP	Backup Lamps, Automatic Transmission Shift Lock Control System
ATC	Automatic Transfer Case
RR DEFOG	Rear Window Defogger, Heated Mirrors (Relay)
RTD	Autoride (Real Time Damping)
RR PRK	Right Rear Parking Lamps
ECM B	VCM/PCM
F/PMP	Fuel Pump (Relay)
O2 A	Oxygen Sensors
O2 B	Oxygen Sensors
LR PRK	Left Rear Parking Lamps
RR DEFOG	Rear Window Defogger, Heated Mirrors
HDLP	Headlamps (Relay)
TRL PRK	Parking Lamps Trailer Wiring
PRIME	Not Used
RT HDLP	Right Headlamps
DRL	Daytime Running Lamps (Relay)
HTD MIR	Heated Mirrors
LT HDLP	Left Headlamps
A/C	Air Conditioning
AUX PWR	Cigarette Lighter, Auxiliary Power Outlets
SEO 2	Special Equipment Option Power, Power Seats, Aux Roof Mnt Lamp
SEO 1	Special Equipment Option Power, Aux Roof Mnt Lamp, Cell Phone
DRL	Daytime Running Lamps
A/C	A/C (Relay)
FOG LP	Fog Lamps
FOG LP	Fog Lamps (Relay)
RADIO	Audio System, Instrument Cluster, Climate Control System
CIGAR	Cigarette Lighter, Auxiliary Power Outlets
RT TURN	Right Turn Signals
BTSI	Automatic Transmission Shift Lock Control System
LT TURN	Left Turn Signals
FR PRK	Front Parking Lamps, Sidemarker Lamps
W/W PMP	Windshield Washer Pump
HORN	Horn (Relay)
IGN C	Ignition Switch, Fuel Pump, PRND321 Display, Crank
RDO AMP	Radio Amplifier
HAZ LP	Exterior Lamps, Hazard Lamps
EXP LPS	Not Used
HORN	Horn
CTSY LP	Interior Lamps
RR WPR	Rear Wipers
TBC	Body Control Module, Remote Keyless Entry, Headlamps

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

GMC Yukon (1999) – fuse box diagram

Year of production: 1999

Instrument Panel Fuse Block

The fuse block access door is on the driver’s side edge of the instrument panel.

Fuses/Circuit Breaker	Usage
1	Stop/TCC Switch, Buzzer, CHMSL, Hazard Lamps, Stoplamps
2	Transfer Case
3	Courtesy Lamps, Cargo Lamp, Glove Box Lamp, Dome/Reading Lamps, Vanity Mirrors, Power Mirrors
4	Instrument Cluster, DRL Relay, Lamp Switch, Keyless Entry, Low Coolant Module, Illuminated Entry Module, DRAC (Diesel Engine)
5	Rear Comfort Controls
6	Cruise Control
7	Auxiliary Power Outlet
8	Crank
9	License Lamp, Parking Lamps, Taillamps, Roof Marker Lamps, Tailgate Lamps, Front Sidemarkers, Fog Lamp Relay, Door Switch Illumination, Fender Lamps, Headlamp Switch Illumination
10	Air Bag System
11	Wiper Motor, Washer Pump
12	A/C, A/C Blower, High Blower Relay
13	Power Amp, Rear Liftglass, Cigarette Lighter, Door Lock Relay, Power Lumbar Seat
14	4WD Indicator, Cluster, Front and Rear Comfort Controls (If Equipped), Instrument Switches, Radio Illumination, Chime Module
15	DRL Relay, Fog Lamp Relay
16	Front and Rear Turn Signals, Back-Up Lamps, BTSI Solenoid
17	Radio (Ignition)
18	4WAL/VCM, ABS, Cruise Control
19	Radio (Battery)
20	PRNDL, Automatic Transmission, Speedometer, Check Gages, Warning Lights
21	Security/Steering
22	Not used
23	Rear Wiper, Rear Washer Pump
24	Front Axle, 4WD Indicator Lamp, TP2 Relay (Gasoline Engine)
A	Power Door Lock, Six-Way Power Seat, Keyless Entry Module
B	Power Windows

Underhood Fuse/Relay Center

The underhood fuse/relay center is located in the rear of the engine compartment near the brake fluid reservoir.

Name	Circuit protected
ECM-B	Fuel Pump, PCM/VCM
RR DEFOG	Rear Window Defogger (If Equipped)
IGN-E	Auxiliary Fan Relay Coil, A/C Compressor Relay, Hot Fuel Module
FUEL SOL	Fuel Solenoid (Diesel Engine)
GLOW PLUG	Glow plugs (Diesel Engine)
HORN	Horn, Underhood Lamps
AUX FAN	Auxiliary Fan
ECM-1	Injectors, PCM/VCM
Injectors, PCM/VCM	Heated Front Seats
A/C	Air Conditioning
HTD MIR	Heated Outside Mirrors (If Equipped)
ENG-1	Ignition Switch, EGR, Canister Purge, EVRV Idle Coast Solenoid, Heated O2, Fuel Heater (Diesel Engine), Water Sensor (Diesel Engine)
HTD ST-RR	Not Used
LIGHTING	Headlamp and Panel Dimmer Switch, Fog and Courtesy Fuses
BATT	Battery, Fuse Block Busbar
IGN-A	Ignition Switch
IGN-B	Ignition Switch
ABS	Anti-Lock Brake Module
BLOWER	Hi Blower and Rear Blower Relays
STOP/HAZ	Stoplamps
HEATED SEATS	Heated Seats (If Equipped)

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.