Uplander AWD V6-3.5L VIN 8 (2005)
9. Clean the sealing surface on the cylinder head with degreaser.
10. Clean the valve rocker arm cover.
Installation Procedure
1. Important: Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent, at the cylinder head to the lower intake manifold joint.
Apply sealant at the cylinder head to the lower intake manifold joints (1).
2. Install a new gasket to the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
3. Install the valve rocker cover.
4. Notice: Refer to Fastener Notice in Service Precautions.
Install the valve rocker arm cover bolts.
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Tighten the bolts to 10 Nm (89 inch lbs.).
5. Connect the PCV valve vacuum line.
6. Install the thermostat bypass pipe.
7. Install the front ignition wire harness.
8. Refill the cooling system.
