16NA249

File in Section:
Bulletin No.:
Service Bulletin
Date:
16-NA-249
August, 2016
INFORMATION
Subject:
Low Audible Whine Noise from Engine
Brand:
Model:
LaCrosse
Buick
Chevrolet
GMC
Pontiac
Saturn
Model Year:
VIN:
from
to
2011
2016
Regal
2011
2017
Verano
2012
2017
Captiva
2010
2017
Cobalt
2010
2010
Equinox
2010
2017
HHR
2010
2011
Malibu
2010
2012
Impala
(VIN 1)
2014
2014
Terrain
2010
2017
2010
2010
from
Engine:
Transmission:
to
LAF, LEA, LHU,
LDK, LUK, LNF,
LE5, LE9
G6
Solstice
SKY
VUE
Involved Region or Country
North America and N.A. Export Regions
Condition
Some customers may comment on a low audible whine noise coming from the engine.
Cause
This may be caused by a new balance shaft chain and/or tensioner.
•
Information
If the whining noise has been found to be transmitting
from the balance shaft drive chain, validation of the
vehicle mileage and/or previous engine repairs must be
performed.
• If the vehicle has been found to have low mileage,
the engine may need additional time for proper
break-in of the balance shaft chain up to 10,000
vehicle miles (16,093 km).
Version
If previous engine repair was performed that
required the balance shaft chain to be removed or
replaced, refer to the latest version of PIP3535.
If after checking for conditions outlined in PIP3535
and correcting as necessary, the whine noise is
still present, this engine may also need additional
time for the proper break-in of the new balance
shaft chain, up to 10,000 miles (16,093 km).
1
Modified
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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