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.
2009 Pontiac G8 BaseFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Control Module (2) | Under right side of dash. See Figure. |
| Blower Motor Control Processor (7) | Bottom center of HVAC unit. See Figure. |
| Body Control Module (BCM) (9) | Under left side of dash, right of steering column. See Figure. |
| Electronic Brake Control Module (EBCM) (V6) (3) | Right rear of engine compartment. See Figure. |
| Electronic Brake Control Module (EBCM) (V8) (5) | Right rear of engine compartment. See Figure. |
| Engine Control Module (ECM) | Right side of engine compartment. See Figure. |
| Engine Control Module (V8) (24) | Right side of engine compartment. See Figure. |
| Express Down Window Module (2) | Behind right kick panel. See Figure. |
| Heated Seat Module (Left) (3) | Under driver's seat. See Figure. |
| Heated Seat Module (Right) (2) | Under front passenger's seat. See Figure. |
| HVAC Control Module (5) | Right side of HVAC unit. See Figure. |
| Inflatable Restraint Sensing & Diagnostic Module (1) | Under center console. See Figure. |
| Navigation Gateway Module (Long Wheel Base) (4) | Under right end of dash. See Figure. |
| Rear Object Alarm Module (7) | Under center of rear parcel shelf. See Figure. |
| Sensing & Diagnostic Module (SDM) (12) | Under center console. See Figure. |
| Sun Roof Control Module (5) | Center front of roof. See Figure. |
| Theft Deterrent Control Module (12) | Part of ignition key cylinder. See Figure. |
| Throttle Actuator Control (TAC) Module (V6) | On throttle body. |
| Transmission Control Module (TCM) (V6) (4) | Right rear of engine compartment. See Figure. |
| Transmission Control Module (TCM) (V8) (6) | Right rear of engine compartment. See Figure. |
| Variable Intake Manifold (VIM) Module (1) | Top left rear of engine. See Figure. |
| Window Control Module | Right kick panel. See Figure. |
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.
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