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.
2007 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Automatic Transmission Floor Shift Control | Beneath center console. See Figure. |
| Body Control Module (BCM) | Behind right front kick panel. See Figure. |
| Electronic Brake Control Module (EBCM) | Left of master cylinder. See Figure. |
| Heated Seat Module - Driver | In driver seat bottom. See Figure. |
| Heated Seat Module - Passenger | In passenger seat bottom. See Figure. |
| HVAC Module | Beneath radio. See Figure. |
| Inflatable Restraint I/P Module | Above dash compartment. See Figure. |
| Inflatable Restraint Passenger Presence System (PPS) Module | On underside of cushion. See Figure. |
| Inflatable Restraint Roof Rail Module - Left | Upper left "B" pillar. See Figure. |
| Inflatable Restraint Roof Rail Module - Right | Upper right "B" pillar. See Figure. |
| Inflatable Restraint Sensing And Diagnostic Module (SDM) | Beneath lower console. See Figure. |
| Inflatable Restraint Steering Wheel Module | In steering column. See Figure. |
| Powertrain Control Module (PCM) | At left front side of engine compartment. See Figure. |
| Transfer Case Shift Control Module | Behind glove box. See Figure. |
| Vehicle Communication Interface Module (VCIM) | Center of dash below HVAC control head. 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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