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.
2003 Hummer H2FACTORY OEM SERVICE PROCEDURE
Control Units
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor | Behind dash, at right front of blower motor assembly. See Figure . |
| Cruise Control Module | At left side of engine compartment, on strut tower. |
| Dash Integration Module | Behind dash, under right dash sound insulator. |
| Electronic Brake Control Module | Under air cleaner housing. See Figure . |
| HVAC Control Module | At center of dash, above radio. |
| Ignition Control Module (ICM) Front Bank | On top of left cam cover. |
| Ignition Control Module (ICM) Rear Bank | On top of right cam cover. See Figure . |
| Inflatable Restraint I/P Module | Under right side of instrument panel pad. |
| Inflatable Restraint Sensing & Diagnostic Module | Under center console, mounted to floorpan. |
| Instrument Panel Integration Module | At center of dash, behind heater & A/C controls. |
| Powertrain Control Module | At left side of engine compartment, under air cleaner. |
| Radio Antenna Module | At rear of headliner. |
| Rear Integration Module | Near upper left corner of rear shelf panel. |
| Remote Control Door Lock Receiver | Behind rear seat back. |
| Sun Roof Module | Above headliner, at rear of sun roof. |
| Theft Deterrent Control Module | Underside of dash, behind radio. |
| Theft Deterrent Exciter Module | Part of ignition switch assembly. |
| Turn Signal/Hazard Flasher Module | Behind left side of dash, above data link connector. |
| Vehicle Communication Unit | Behind rear seat back. |
| Vehicle Interface Unit | Behind rear seat back. |
Factory Service Tools
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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.