Yukon Denali 4WD V8-6.0L Hybrid (2011)
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.
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Do not apply sealant to the first 3 threads of the bolt.
Caution: Refer to Fastener Caution See: Service Precautions/Vehicle Damage Warnings/Fastener Caution.
1. If the exhaust manifold was replaced, position and install the exhaust manifold heat shield, and bolts to the exhaust manifold.
Tighten the bolts to 9 Nm (80 lb in).
2. Clean the threads of the exhaust manifold bolts.
3. 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
