Compressor Air Intake Turbocharger Hissing Noise

Engine Mechanical - 3.0L LM2 Diesel | Diagnostic Information and Procedures | Document ID: 2370751 Turbocharger Hissing Noise

Condition	Action
Air inlet leaks or obstructions	Inspect the turbocharger inlet pipes/hoses for leaks or obstructions.
Leaking charge air cooler/pipes/hoses	Inspect the charge air cooler/pipes/hoses for leaks or obstructions.
Leaking or restricted exhaust system	1. Inspect the exhaust system for a leak. 2. Inspect the exhaust system for a restrictions.
Intake system leaks or obstructions	1. Inspect the intake manifold for a leak. 2. Inspect the intake manifold for restrictions.