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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 4.3L) >> Diagnostic Information and Procedures >> Base Engine Misfire with Abnormal Valve Train Noise

Base Engine Misfire with Abnormal Valve Train Noise

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Base Engine Misfire with Abnormal Valve Train Noise

Cause Correction
Worn, damaged or loose rocker arm
  • Inspect the valve rocker arms.
  • Repair or replace damaged components as required.
Worn, damaged, loose or bent valve push rod
  • Inspect the valve push rods.
  • Repair or replace damaged components as required.
Worn, damaged or stuck valve, carbon on the valve stem or valve seat
  • Inspect the valves.
  • Inspect the valve guides.
  • Repair or replace damaged components as required.
Worn, damaged or dirty valve lifter
  • Inspect the valve lifters.
  • Inspect the camshaft.
  • Repair or replace damaged components as required.
Worn or damaged camshaft lobe
  • Inspect the camshaft.
  • Inspect the valve lifters.
  • Repair or replace damaged components as required.
Worn, damaged or loose timing chain and sprockets
  • Inspect the timing chain and sprockets.
  • Repair or replace damaged components as required.