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 MANUALSOLDSMOBILE2004BRAVADA RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1022 (ENGINE COOLING SYSTEM)DESCRIPTION AND OPERATIONSTARTER GENERATOR CONTROL MODULE COOLING SYSTEM DESCRIPTION AND OPERATIONSGCM COOLING SYSTEM OPERATION
2004 Oldsmobile Bravada RWD
SGCM Cooling System Operation
2004 Oldsmobile Bravada RWDSECTION SGCM Cooling System Operation
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The purpose of the starter/generator control module (SGCM) coolant system is to cool the SGCM internal electronics. The SGCM commands the SGCM the SGCM coolant pump and coolant fan ON or OFF at the following temperatures:
- Coolant pump from OFF to ON at 60° C (140° F)
- Coolant pump from ON to OFF at 55° C (131° F)
- Coolant fan from OFF to low speed at 75° C (167° F)
- Coolant fan from low speed to high speed at 80° C (176° F)
- Coolant fan from high speed to low speed at 75° C (167° F)
- Coolant fan from low speed to OFF at 70° C (158° F)
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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.