Fuses and relays Hummer H2 (GMT820; 2002–2007)

The H2 is a full-size SUV manufactured by General Motors under the Hummer brand at its purpose-built assembly plant in Mishawaka, Indiana. This guide provides comprehensive fuse box diagrams and power distribution center locations for first-generation Hummer H2 GMT820 models (model years 2002, 2003, 2004, 2005, 2006, and 2007).

Below are the locations, diagrams, and photos for the power distribution blocks. Fuses designated for the “Cigarette Lighter” and “Fuel Pump” are highlighted in bold text.

Engine Compartment Fuse Block

Located in the engine compartment near the battery.

Lift the protective cover to access the fuses.

General view of the underhood fuse block.

Diagram
No.	Description	Amps
R1	Park and Side Marker Lamps Relay
R2	Starter Relay
R3	Ignition Relay
R4	Hummer H2 Fuel Pump Relay
R5	High-Beam Headlamp Relay
R6	Daytime Running Lamps (DRL) Relay
R7	Low-Beam Headlamp Relay
R8	Air Conditioning (A/C) Compressor Clutch Relay
R9	Not Used
R10	Horn Relay
R11	Windshield & Rear Window Washer Pump Relay
1	Auxiliary / Trailer Power Wiring	40 A
2	Not Used	-
3	Instrument Panel Relay Block Circuit Breakers CB1 and CB2	50 A
4	HVAC Blower Motor (High Speed)	40 A
5	Instrument Panel Fuse Block: Fuses #6, #19, #24, #27	50 A
6	Auxiliary Off-Road Lamps, Trailer Wiring	30 A
7	Anti-Lock Brake System (ABS)	60 A
8	Electronically Controlled Air Suspension (ECAS) Relay	60 A
9	Ignition Switch	40 A
10	Not Used	-
11	Ignition Switch	40 A
12	Instrument Panel Fuse Block: Fuses #20, #25, #26, CB1	50 A
13	Trailer Park Lamps	15 A
14	Right Rear Park Lamp, Right Side Marker Lamp, License Plate Lamp	10 A
15	Left Rear Park Lamp, Left Side Marker Lamp, License Plate Lamp	10 A
16	Roof Marker Lamps, SIR Cut-Off Switch, Park/Marker Lamps, Trailer Wiring	10 A
17	Stop Lamp Switch	25 A
18	Body Control Module (BCM)	10 A
19	Power Sunroof	25 A
20	Electronic Brake Control Module (EBCM), Auxiliary Off-Road Lamps	30 A
21	EVAP Canister Vent Solenoid	15 A
22	Rear HVAC Control Module	30 A
23	Console Auxiliary 12 V Power Outlet	20 A
24	Powertrain Control Module (PCM), EVAP Purge Solenoid, Mass Air Flow (MAF) Sensor, Intake Air Temperature (IAT) Sensor	15 A
25	Throttle Actuator Control (TAC), Electronic Brake Controller	15 A
26	Ignition Coils, Fuel Injectors	15 A
27		15 A
28	Instrument Panel Cluster, A/C Relay, Turn Signal/Hazard Flasher, Starter Relay, Transfer Case Switch	10 A
29	Electronic Brake Control Module	30 A
30	Trailer Stop / Turn / Back-Up Lamps	10 A
31	Powertrain Control Module (PCM), Fuel Pump Fuse	20 A
32	Oxygen (O2) Sensors	15 A
33	Back-Up Lamps, Park/Neutral Position (PNP) Switch	20 A
34	Rear Window Defogger Relay	30 A
35	Oxygen (O2) Sensors	15 A
36	Supplemental Inflatable Restraint (SIR) Switch, Sensing and Diagnostic Module (SDM)	15 A
37	Front Park Lamps, Front Side Marker Lamps	10 A
38	Rear Window Defogger Relay	10 A
39	Body Control Module (BCM)	10 A
40	Left High-Beam Headlamp	10 A
41	Not Used	-
42	Daytime Running Lamps (DRL) Relay	10 A
43	Instrument Panel Cluster (IPC) / Driver Information Center (DIC)	10 A
44	HVAC Control Module / Air Suspension Control Module	10 A
45	Hummer H2 Cigarette Lighter Fuse, Data Link Connector (DLC)	15 A
46	Right High-Beam Headlamp	10 A
47	A/C Compressor Relay	10 A
48	Rear Wiper / Washer	25 A
49	Not Used	-
50	Audio System Unit, Rear Seat Audio (RSA)	15 A
51	Heated Rear Seats, HomeLink Universal Transceiver	15 A
52	Left Low-Beam Headlamp	10 A
53	Brake Transmission Shift Interlock (BTSI) Solenoid	10 A
54	Starting System, Ignition Switch, Powertrain Control Module (PCM)	10 A
55	Right Low-Beam Headlamp	10 A
56	Not Used	-
57	Windshield & Rear Window Washer Pump	15 A
58	Vehicle Communication Interface Module (VCIM / OnStar)	15 A
59	Audio Power Amplifier	30 A
60	Not Used	-
61	Horn	15 A
62	Not Used	-
63	Transfer Case Control Module (TCCM)	30 A
64	Not Used	-
65	Customer Feed / Auxiliary Battery Power	125 A

Passenger Compartment Fuse Blocks

There are two fuse blocks located in the passenger compartment. Fuse Box #1 is situated on the driver’s side end of the instrument panel. Fuse Box #2 is mounted under the dashboard, to the left of the steering column.

Fuse Box #1

 
Located on the driver’s side end panel of the instrument panel.

Overview of the instrument panel fuse block.

Diagram
No.	Description	Amps
R1	Power Door Lock Relay
R2	Power Door Unlock Relay
R3	Not Used
R4	Not Used
1	Rear Window Wiper & Washer Switch	15 A
2	Heated Rear Seats	10 A
3	Transfer Case Shift Control Switch (4WD Switch), Air Suspension Control Switch/Module, Ride Height Switch	15 A
4	Brake Transmission Shift Interlock (BTSI), Powertrain Control Module (PCM), Transmission Control	10 A
5	Stop Lamps, Anti-Lock Brake Module, Electronic Throttle Control (ETC) Module, Turn Signal/Hazard Flasher Module, Fuse #14	15 A
6	Driver Door Module (DDM)	15 A
7	Liftgate Door Lock Relay	10 A
8	Body Builder Provisions / Auxiliary Harness	10 A
9	Spare	30 A
10	Inside Rearview Mirror, HVAC Control Module & Actuators	10 A
11	Cruise Control Switch / Module	10 A
12	Stop Lamp Switch	10 A
13	Body Control Module (BCM)	10 A
14	Center High-Mounted Stop Lamp (CHMSL) - Vehicle & Trailer	10 A
15	Windshield Wipers	25 A
16	Body Control Module (BCM)	10 A
17	Left Trailer Turn Signal / Stop Lamp	10 A
18	Right Trailer Turn Signal / Stop Lamp	10 A
19	Instrument Panel & Rear Cargo Area 12 V Auxiliary Power Outlets	20 A
20	Body Control Module (BCM)	15 A
21		15 A
22	Left Turn Signals, Left Side Marker Lamps, Instrument Panel Cluster	10 A
23	Right Turn Signals, Right Side Marker Lamps, Instrument Panel Cluster	10 A
24	Door Lock / Unlock Relays	20 A
25	Turn Signal / Hazard Flasher Module	25 A
26	Body Control Module (BCM)	15 A
27	Passenger Door Module (PDM)	10 A
CB1	Left Rear Power Window & Driver Door Module Circuit Breaker	25 A

Fuse Box #2

Located under the dashboard, to the left of the steering column.

Diagram
R1	Rear Window Defogger Relay
R2	Not Used
CB1	Driver & Passenger Power Seat Modules	30 A
CB2	Passenger Door Module (PDM) Right Rear Power Window	25 A