17-NA-222

File in Section:
Bulletin No.:
Service Bulletin
Date:
17-NA-222
September, 2017
TECHNICAL
Subject:
Turbocharger Whine Noise
Brand:
Model:
Chevrolet
GMC
Model Year:
VIN:
from
Engine:
Transmission:
from
to
to
Colorado
Express
2016
2018
LWN
All
Canyon
Savana
2016
2018
LWN
All
Involved Region or Country
North America and N.A. Export Regions
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.
Correction
Replace the turbocharger.
Parts Information
Use the vehicle identification number (VIN), SI, and the
GM Electronic Parts Catalog to determine the proper
part to order.
Description
Part
Number
Qty
TURBOCHARGER ASM
55486936
1
TURBOCHARGER ASM
55496255
1
Warranty Information
Labor
Operation
Description
Labor Time
4068290
Turbocharger Replacement
Use
Published
Labor
Operation
Time
Service Procedure
If you encounter a vehicle with the above concern,
inspect the turbocharger compressor blades.
Copyright 2017 General Motors LLC. All Rights Reserved.
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
September, 2017
Version
2
Modified
August 30, 2017 — Added 2018 Model Years.
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.
Bulletin No.: 17-NA-222
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