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Turbocharger Hissing Noise

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Turbocharger Hissing Noise

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 46901.
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. Inspect for leaks in the intake manifolds.
  2. Inspect for obstructions in the intake manifolds.
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