Silverado 1500 2WD V8-4.8L VIN V (2006)
Radiator Cap: Testing and Inspection
Pressure Cap Testing - Starter/Generator Control Module
Pressure Cap Testing - Starter/Generator Control Module
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Tools Required
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J 24460-01 Cooling System Pressure Tester
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J 46143 Cooling System Adapter
1. 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.
Follow the steps below in order to remove the starter/generator control module (SGCM) coolant tank cap.
1. Slowly rotate the cap counterclockwise.
2. Stop rotating and allow the hissing to stop.
3. After all the hissing stops, continue turning counterclockwise in order to remove the cap.
2. Wash the pressure cap sealing surface with water.
3. Use the J 24460-01 (1) with the J 46143 in order to test the pressure cap.
4. Test the pressure cap for the following conditions:
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Pressure release when the J 24460-01 exceeds the pressure rating of the pressure cap.
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Maintain the rated pressure for at least 10 seconds. Note the rate of pressure loss.
5. Replace the pressure cap under the following conditions:
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The pressure cap does not release pressure which exceeds the rated pressure of the cap.
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The pressure cap does not hold the rated pressure.
