GM Service Manual Online
For 1990-2009 cars only

Turbocharger Hissing Noise LDK

Condition

Action

Air inlet leaks or obstructions

Inspect for leaks or obstructions in the turbocharger inlet.

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.
  2. Inspect for obstructions.