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.
2005 Pontiac Grand Prix BaseFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor | On lower right side of dash. See Figure. |
| Body Control Module | Behind left side of dash, left of steering column. See Figure. |
| Coolant Level Module | On right side of radiator. |
| Cruise Control Module | Front of left strut tower. |
| Daytime Running Lamps (DRL) Control Module | Behind left side of dash. |
| Digital Radio Receiver | Left side of rear compartment. See Figure. |
| Driver Seat Heater Control Module | Below right side of driver's seat, mounted on seat track. |
| Electronic Brake Control Module | Left side of engine compartment, part of brake pressure modulator valve. See Figure. |
| Electronic Compass Module | Top left side of rear package shelf. See Figure. |
| HVAC Control Module | Center of dash. |
| Ignition Control Module (ICM) | Top left front of engine. See Figure. |
| Inflatable Restraint I/P Module | Behind right side of dash. See Figure. |
| Inflatable Restraint I/P Module Connector | Right side of dash. See Figure. |
| Inflatable Restraint Sensing & Diagnostic Module (SDM) | Under right front seat. See Figure. |
| Powertrain Control Module (3.8L) | Left front side of engine compartment, in air cleaner assembly. See Figure. |
| Powertrain Control Module (5.3L) | Left side of engine compartment, inside air cleaner assembly. See Figure. |
| Radio Antenna Module | Center rear of roof. See Figure. |
| Remote Control Door Lock Receiver (RCDLR) | Behind right side of dash. See Figure. |
| Roof Rail Module-Left | Left rear of passenger compartment. See Figure. |
| Roof Rail Module-Right | Right rear of passenger compartment. See Figure. |
| Sun Roof Module | Front center of sun roof module. See Figure. |
| Theft Deterrent Exciter Module | Part of ignition key cylinder. See Figure. |
| Throttle Actuator Control (TAC) Module (3.8L) | On throttle body. See Figure. |
| Throttle Actuator Control (TAC) Module (5.3L) | Top rear of engine. See Figure. |
| Vehicle Communications Interface Module (VCIM) | In trunk, on left wheelwell. See Figure. |
| Vehicle Interface Unit | In trunk, on left wheelwell. |
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.