Information on Turbocharger Whine Noise – 2016-2021 Chevrolet GMC

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Service Bulletin Bulletin No.: 17-NA-222
Date: November, 2020
TECHNICAL
Subject: Information on Turbocharger Whine Noise
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Chevrolet
Colorado 2016
2021 LWN
Express 2017
GMC
Canyon 2016
Savana 2017
Involved Region or Country North America, Guatemala, Peru, Korea, Saudi Arabia, Israel, Thailand, Venezuela,
South Africa
Additional Options (RPOs) Equipped with 2.8L Diesel Engine (RPO LWN)
Condition Some customers may comment on a whine noise during acceleration, in gear, or Neutral.
Cause This condition may be caused by a bent turbocharger compressor blade.
Information
If you encounter a vehicle with the above concern, inspect the turbocharger compressor
blades.
4818843
If one of the blades is bent as illustrated above, replace the turbocharger. Refer to
Turbocharger Replacement in SI.
If none of the blades are bent, continue diagnosis referring to SI.
Page 2 November, 2020 Bulletin No.: 17-NA-222
Version 5
Modified
Released July 12, 2017
Revised August 24, 2017 — Added 2018 Model Years.
Revised July 24, 2018 – Added 2019 Model Year.
Revised September 18, 2019 – Added 2020 Model Year.
Revised October 26, 2020 – Made bulletin an Informational Bulletin, Added 2021 Model
Year and removed 2016 from Express and Savana.
GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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