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65. Lower Intake Manifold Cleaning and Inspection
Lower Intake Manifold Cleaning and Inspection
1. Clean the intake manifold gasket mating surfaces (3) using GM P/N 12346139 (Canadian P/N 10953463) or equivalent.
2. Clean the fuel injector bores (1).
3. Inspect the lower intake manifold locating pins (2) for damage. Replace as necessary.
4. Inspect the intake manifold for damage.
Important: If replacing the lower intake manifold, make sure to transfer or replace the locating pins as necessary.
5. Repair or replace the intake manifold as necessary.