17NA353

File in Section:
Bulletin No.:
Service Bulletin
Date:
17-NA-353
November, 2017
TECHNICAL
Subject:
Brand:
Buick
Holden
Engine Cover Discoloration
Model:
Cascada
Model Year:
VIN:
from
to
2017
2018
from
Engine:
Transmission:
to
LWC
Involved Region or Country
North America, Europe
Condition
Some customers may comment that the engine cover appears discolored.
Cause
This condition may be caused by insufficient cooling fan after-run time during soak after
high speed / load driving condition may lead to thermal stress on engine cover material.
Correction
If you encounter a vehicle with the above concern, replace the engine cover and
reprogram the ECM software with the latest calibration available. The improved cooling
fan after-run time lowers the thermal impact on the engine cover. Also, inspect the
vacuum lines to the Turbocharger Wastegate Regulator Solenoid Valve for heat damage.
Replace damaged vacuum lines as required.
Service Procedure
Parts Information
Note: Inform the customer that there is a possibility the
cooling fan may stay on after the vehicle is shut off.
Refer to the Electronic Parts Catalog (EPC) to obtain
the proper part number.
Refer to K20 Engine Control Module: Programming and
Setup in SI.
Refer to Engine Sight Shield Replacement in SI.
Warranty Information
For vehicles repaired under warranty, use:
Version
1
Modified
Released November 9, 2017
Labor
Operation
Description
Labor Time
4060390
Engine Sight Shield
Replacement
Use
Published
Labor
Operation
Time
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.
Copyright 2017 General Motors LLC. All Rights Reserved.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION