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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1628 (Engine Mechanical - 6.6L (LMM) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Turbocharger Whine Noise

Turbocharger Whine Noise

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Condition Action
Some whine noise is normal. Compare to a known good vehicle.
Leaking charge air cooler/pipes/hoses Inspect for leaks in charge air cooler/pipes/hoses using J 46091  .
Worn turbocharger bearings Visually inspect for evidence of compressor wheel to housing contact.
If the turbocharger bearings are worn or damaged, inspect for a Turbocharger Lack of Oil Supply .
Intake system leaks or obstructions
  1. With the engine off, pressurize the intake system using J 46091  and inspect for intake manifold leaks.
  2. Inspect for obstructions in the intake manifolds.
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