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.
Loss of Coolant - Starter/Generator Control Module
2004 Oldsmobile Bravada RWDSECTION Loss of Coolant - Starter/Generator Control Module
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.
Loss of Coolant - Starter/Generator Control Module
| Step | Action | Yes | No |
|---|---|---|---|
| DEFINITION: The starter/generator control module (SGCM) cooling system is loosing coolant either internally or externally. | |||
| 1 | Were you sent here from Symptoms, or another diagnostic table? | Go to Step 2 | Go to Symptoms - Engine Cooling |
| 2 | Repair any present DTCs. Refer to Diagnostic System Check - Engine Cooling . Is the action complete? |
Go to Step 3 | - |
| 3 | Inspect the coolant level. Is the coolant at the proper level? |
Go to Step 5 | Go to Step 4 |
| 4 | Fill the SGCM cooling system to the proper level. Refer to Draining and Filling Cooling System - Starter/Generator Control Module . Is the action complete? |
Go to Step 5 | - |
| 5 | Visually inspect the hoses, pipes and hose clamps. Are any of the hoses, clamps or pipes leaking? |
Go to Step 10 | Go to Step 6 |
| 6 | Visually inspect the following components:
Are any of the listed components leaking? |
Go to Step 10 | Go to Step 7 |
| 7 |
|
Go to Step 10 | Go to Step 8 |
| 8 | Pressure test the SGCM coolant pressure cap. Refer to Pressure Cap Testing - Starter/Generator Control Module . Does the coolant pressure cap hold pressure? |
Go to Step 11 | Go to Step 9 |
| 9 | Replace the coolant pressure cap. Is the repair complete? |
Go to Step 11 | - |
| 10 | Repair or replace the leaking component. Refer to the appropriate repair. Is the repair complete? |
Go to Step 11 | - |
| 11 | Operate the system in order to verify the repair. Did you find and correct the condition? |
System OK | Go to Step 2 |
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.