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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 407 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESCOOLANT LEAK TESTING - STARTER/GENERATOR CONTROL MODULE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Coolant Leak Testing - Starter/Generator Control Module
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Coolant Leak Testing - 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.
Tools Required
- J 24460-01 Cooling System Pressure Tester. See Special Tools and Equipment .
- J 46143 Cooling System Adapter. See Special Tools and Equipment .
- Follow the steps below in order to remove the starter/generator control module (SGCM) coolant tank cap.
- Slowly rotate the cap counterclockwise.
- Stop rotating and allow the hissing to stop.
- After all the hissing stops, continue turning counterclockwise in order to remove the cap.
- Test the operation of the pressure cap. Refer to Pressure Cap Testing - Starter/Generator Control Module .
- Wash the pressure cap mating surface with water.
- Use the J 24460-01
with the J 46143
in order to apply pressure to the cooling system.IMPORTANT: Do not exceed the pressure cap rating.
- The cooling system should hold the rated pressure for at least 2 minutes.
Observe the gage for any pressure loss.
- Repair any leaks as required.
CAUTION:
To avoid being burned, do not remove the starter/generator control module (SGCM) cap while the SGCM is hot. The cooling system will release scalding fluid and steam under pressure if the SGCM cap is removed while the SGCM is still hot.
RENDER: 1.0x
NO RELATED
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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.