Avalanche 1500 2WD V8-5.3L (2008)
Refer to Engine Block Plug Installation (See: Service and Repair/Overhaul) .
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Improper operation of the active fuel management oil pressure relief valve
Refer to Cylinder Deactivation (Active Fuel Management) Oil Pressure Relief Valve Diagnosis and Testing (See: Testing and
Inspection/Component Tests and General Diagnostics) .
