News Technical Service Bulletins

Chevy Truck Turbo Is Whiny

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Inspect the turbo for a bent compressor blade.

This bulletin applies to 2016-2017 Chevy Colorado and Express vehicles equipped with a 2.8L diesel engine. Some customers may comment about a whiny noise during acceleration, in gear or neutral. The condition may be caused by a bent turbocharger compressor blade. If a bent blade is found, replace the turbo.

Use the VIN, service manual and GM Electronic Parts Catalog to determine which turbocharger is correct for the vehicle. The choice is P/N 55486936 or 55496255.

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