Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Hummer H2 4D Utility PickupFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Air Suspension Control Module (11) | Center rear of vehicle, in front of trailer hitch. See Figure. |
| Blower Motor Control Module-Auxilliary (3) | Rear of auxiliary HVAC module above blower motor-auxiliary. See Figure. |
| Blower Motor Control Processor (7) | Behind right side of dash, on HVAC assembly. See Figure. |
| Body Control Module (BCM) (8) | On lower left side of dash, to left of steering column. See Figure. |
| Electronic Brake Control Module (ECBM) (2) | Behind fuse block-underhood, to left of brake fluid reservoir. See Figure. |
| Engine Control Module (ECM) (5) | Below battery and fuse block-underhood. See Figure. |
| Fuel Pump Flow Control Module (1) | Mounted to rear frame, near EVAP canister vent solenoid valve. See Figure. |
| Heated Seat Control Module-Rear (3) | Under front of left rear second row seat. See Figure. |
| Inflatable Restraint I/P Module (9) | Right side of dash, directly in front of passenger seat. See Figure. |
| Inflatable Restraint Roof Rail Module-Left Front (3) | Behind rear side of left "C" pillar. See Figure. |
| Inflatable Restraint Roof Rail Module-Left Rear (9) | Behind left side of headliner trim above quarter window. See Figure. |
| Inflatable Restraint Roof Rail Module-Right Front (2) | Behind right side of headliner trim to rear of "C" pillar. See Figure. |
| Inflatable Restraint Roof Rail Module-Right Rear (5) | Behind right side of headliner trim above quarter window. See Figure. |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) (7) | Under left front seat. See Figure. |
| Inflatable Restraint Steering Wheel Module (4) | Under horn pad. See Figure. |
| Memory Seat Module | Under driver seat. See Figure. |
| Powertrain Control Module (PCM) | On left front of engine compartment. See Figure. |
| Rear Window Wiper/Washer Module | At center of liftgate. See Figure. |
| RSA Controller | At rear of center console. See Figure. |
| Sunroof Module (10) | In front of headliner, near front overhead console. See Figure. |
| Theft Deterrent Module (TDM) (5) | Near ignition key cylinder. See Figure. |
| Transfer Case Shift Control Module | Behind headlight switch. See Figure. |
| Transmission Control Module (TCM) | Part of automatic transmission. |
| Vehicle Communication Interface Module (4) | At center of dash, below HVAC control module. See Figure. |
| Windshield Wiper/Washer Module | Under windshield cowl, between wiper arms. See Figure. |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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