Envoy 2WD V8-5.3L (2007)
Exhaust Manifold: Service and Repair
Exhaust Manifold Replacement - Left Side
Exhaust Manifold Replacement - Left Side
Removal Procedure
1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the nuts securing the catalytic converter to the left exhaust manifold.
3. Lower the vehicle.
4. Remove the spark plugs. Refer to Spark Plug Replacement for the 5.3L engine or Spark Plug Replacement for the 6.0L engine.
5. Remove the heat shield bolts, and shield from the exhaust manifold.
6. Remove the exhaust manifold bolts, manifold, and gasket.
7. Discard the gasket.
8. Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection for the 5.3L engine or Exhaust Manifold Cleaning and
Inspection for the 6.0L engine.
Installation Procedure
Important:
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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.
