PIP5483B

Bulletin No.: PIP5483B
Published date: 11/8/2018
Preliminary Information
PIP5483B Normal Characteristics After Vehicle is Turned O
Models
Brand:
Model:
Model Years:
Chevrolet
Cruze
2017 - 2019
Chevrolet
Equinox
2018 - 2019
GMC
Terrain
2018 - 2019
VIN:
Engine:
Transmissions:
from
to
All
All
1.6L Turbo Diesel (LH7)
All
All
All
1.6L Turbo Diesel (LH7)
All
1.6L Turbo Diesel (LH7)
All
All
Involved Region or
Country
North America
Condition
A dealer may encounter a customer concern of the cooling fan
running, a ratcheting, squeak, chirp, moan, and whine or buzz type
noises heard shortly after the vehicle has been turned off.
Cause
There are some components that may produce noises shortly after
the engine has been turned off:
1-The Intake Manifold Runner Control Valve Actuator may be heard
cycling under the hood.
1.1 This is done as an integrity check and to confirm that the
mechanical link between the actuator and the intake manifold runner
is still connected.
(1) Intake Manifold Runner Control Valve Actuator
2- The Diesel Exhaust Fluid (DEF) Pump and DEF Reverting Valve
purging DEF.
2.1 The Diesel Exhaust Fluid (DEF) Pump and DEF Reverting Valve
may be heard from the vehicle and/or right rear of the vehicle. When
the vehicle is turned off the DEF pump and reverting valve operate
to relieve the DEF system pressure and to clear the lines of DEF. The
reverting valve is opened to relieve the pressure and send the fluid
back to the DEF tank, and then the reverting valve is closed once the
DEF lines are clear.
3- When the vehicle is shut off while a particulate filter
3- When the vehicle is shut off while a particulate filter
cleaning process in active, the cooling fan will run for two
minutes to cool of the particulate filter.
3.1 The cooling fan running after shutting off the vehicle and
it may be accompanied by a hot odor.
Correction:
The noises below are considered to be normal operating characteristics of the vehicle.
It will not impact the designed performance or reliability of the vehicle.
U.S Dealers:
The noises described above were discussed in and samples are available to listen to on the
GM Center of Learning web site, centerlearning.com, in course number 10217.03V, March
2017 Emerging Issues which will be available by March 9th. It will be in the Powertrain
segment.
Canadian Dealers:
Watch for this topic in the April 2017 TAC Talk Powertrain segment; on the GM Canada Centre
of Learning website.
Version History
Version
Modi ed
2
03-10-2017- Created
10-17-2018- Updated to add 2018 Model Year
11-08-2018 - Updated models and model years.
© 2018 General Motors. All Rights Reserved.