Colorado 2WD V8-5.3L (2009)
8. Remove the exhaust manifold bolts (1).
9. Remove the exhaust manifold (2) and gasket (3). Discard the gasket.
Installation Procedure
Note:
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Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may affect
vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.
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The cylinder head exhaust manifold bolt hole threads must be clean and free of debris or threadlocking material.
Note: Do not apply sealant to the first 3 threads of the bolt.
1. Apply a 5 mm (0.2 in) wide band of threadlock GM P/N 12345493, (Canadian P/N 10953488), or equivalent to the threads of the exhaust
manifold bolts.
2. Ensure that the exhaust seal is still seated on the catalytic converter recess.
3. Install one exhaust manifold bolt to the exhaust manifold (2) and place the NEW gasket (3) onto the bolt.
4. Install the exhaust manifold to the catalytic converter flange and position the manifold to the cylinder head.
