Coolant Loss, Low Coolant Light On, Engine Overheating (Reseal Oil Cooler Cover with Sealant)

Some owners may comment on a loss of coolant, low coolant light on, and/or engine overheating.

Condition may be caused by an oil cooler cover leak due to an adhesion condition between the oil cooler cover and the engine block.

Thoroughly clean the engine block and oil cooler cover and reseal with sealant using the following procedure.

1. Remove the oil cooler cover from the engine. Refer to Oil Cooler Replacement in the Engine Mechanical section of the Service Manual.
2. Remove the old sealant from the engine block and the oil cooler cover. Use only a plastic or metal scraper as described in Corporate Service Bulletin Number 00-06-01-012.
3. Clean the engine block and oil cooler cover mating surfaces using a solvent that leaves no residue, such as P/N 12346139 (in Canada, use P/N 10953463), or equivalent.



4. Apply a continuous 2 mm (0.08 in) bead of sealant, P/N 12378521 (in Canada, use P/N 88901148), in the in the groove around the engine oil cooler cover.
5. Install the oil cooler cover to the engine. Refer to Oil Cooler Replacement in the Engine Mechanical section of the Service Manual.

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: