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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 Hissing Noise

Turbocharger Hissing 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
Air inlet leaks or obstructions Inspect for leaks or obstructions in the turbocharger inlet pipes/hoses.
Leaking charge air cooler/pipes/hoses Inspect for leaks or obstructions in the charge air cooler/pipes/hoses using J 46091  .
Leaking or restricted exhaust system
  1. Inspect for a leak in the exhaust system.
  2. Inspect for a restricted exhaust system.
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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