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.
2004 Pontiac Aztek Base, FWDFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location |
|---|---|
| Blower Motor Control Processor | Part of HVAC module, behind glove box, in front of blower motor. |
| Body Control Module (Buick) | In console, above fuse block, in center console. See Figure. |
| Body Control Module (Pontiac) | In console, above fuse block, in center console. See Figure. |
| Cruise Control Module | At left side of engine compartment, near strut tower. See Figure. |
| Electronic Brake Control Module (EBCM) | Left side of engine compartment. |
| HVAC Control Module | Center of dash, below radio. See Figure. |
| Ignition Control Module | On top of right valve cover. See Figure. |
| Inflatable Restraint I/P Module | Right side of dash, above glove box. See Figure. |
| Inflatable Restraint Sensing & Diagnostic Module | Under right front seat. See Figure. |
| Inflatable Restraint Steering Wheel Module | In steering wheel. See Figure. |
| Memory Seat & Mirror Module | Under driver seat. |
| OnStar® Transceiver | Under dash, left of blower motor. |
| Powertrain Control Module (PCM) | At left side of engine compartment, in air cleaner assembly. See Figure. |
| Rear Parking Assist (RPA) Module | Behind front center dash console. See Figure. |
| Remote Control Door Lock Receiver | Behind center of dash, near windshield defrost vent, in sun roof assembly. |
| Sensing & Diagnostic Module (SDM) | Under front passenger seat, below carpet. See Figure. |
| Sun Roof Module | In sun roof assembly. See Figure. |
| Theft Deterrent Control Module | In steering column, at ignition switch. See Figure. |
| Turn Signal/Multifunction Flasher Module | In center console fuse block. |
| Vehicle Communication Unit | Under dash, left of blower motor. |
| Vehicle Interface Unit | Under dash, left of blower motor. |
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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