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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Mechanical - 2.8L (LWN) Diesel) >> Diagnostic Information and Procedures >> Compressor Air Intake Turbocharger Whine Noise

Compressor Air Intake Turbocharger Whine Noise

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools 

J 46091  Charge Air Cooler Tester

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  tester.
Worn turbocharger bearings Visually inspect for evidence of compressor wheel to housing contact.
If the turbocharger bearings are worn or damaged, inspect for a restricted turbocharger oil feed line.
Intake system leaks or obstructions
  1. With the engine off, pressurize the intake system using J 46091  tester and inspect for intake manifold leaks.
  2. Inspect for obstructions in the intake manifolds.
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