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.
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HOMESERVICE MANUALSPONTIAC2008GRAND PRIX V6-3.8LREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - HVACCONTROL MODULE HVACTESTING AND INSPECTION
2008 Pontiac Grand Prix V6-3.8L
Control Module HVAC: Testing and Inspection
2008 Pontiac Grand Prix V6-3.8LSECTION Testing and Inspection
HVAC Control Module Programming and Setup
Each of the following service procedures may require programming or setup procedures to be performed on the HVAC control module or HVAC actuators.
HVAC Control Module Replacement
If the HVAC manual or HVAC automatic control modules are replaced, an automatic re-calibration of all the actuators will occur. For the best re-calibration results, start and run the engine for at least one minute after installing the new module . Do not adjust any controls on the HVAC control module during the re-calibration procedure. If interrupted, improper HVAC performance may result. No additional procedures are necessary.
HVAC Control Module Reprogramming
Do not reprogram the HVAC control module unless directed by a service procedure or a service bulletin.
Reprogram HVAC Control Module-Refer to Service Programming System (SPS) (Programming and Relearning) .
Actuator Replacement
If an actuator is replaced, the following procedure must be performed.
Re-Calibrating Actuators-Refer to Actuator Recalibration (Programming and Relearning) for the manual system.
Re-Calibrating Actuators-Refer to Actuator Recalibration (Programming and Relearning) for the automatic system.
RENDER: 1.0x
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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.