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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1065 (Engine Mechanical - 6.6L (1 Of 5)) >> Diagnostic Information and Procedures >> Base Engine Misfire with Excessive Oil Consumption

Base Engine Misfire with Excessive Oil Consumption

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Condition Action
Worn valve guides
  1. Inspect the valves and valve guides.
  2. Repair or replace all damaged components.
Worn valve stem oil seals
  1. Inspect the valve stem oil seals.
  2. Repair or replace all damaged components.
Excessive piston-to-cylinder bore clearance
  1. Perform cylinder leak down and compression tests to determine the cause.
  2. Inspect the piston rings for low ring tension, broken or worn rings.
  3. Inspect cylinder bore.
  4. Repair or replace all damaged components.