19NA064

Bulletin No.:
Service Bulletin
Date:
19-NA-064
March, 2019
INFORMATION
Subject:
Brand:
Information on Vehicle Pulls to the Left or Right When Regenerative Braking Paddle
Applied and/or When Brake Pedal Applied
Model:
Model Year:
VIN:
from
to
ELR
2014
2016
CT6
2017
2018
Bolt EV
2017
2019
Volt
2011
2019
Holden
Volt
2013
2014
Opel /
Vauxhall
Ampera-e-EV
2017
2019
Cadillac
Chevrolet
from
to
Engine:
Transmission:
All
All
Involved Region or Country
North America, N.A. Export Regions, Australia
Condition
Some customers may comment that their vehicle pulls to the left or right when
regenerative braking paddle is used and/or when braking with the brake pedal.
Cause
The purpose of this communication is to first direct the technician to an inspection of the
vehicle’s tires. The cause of the condition has most commonly been found to be one or
more of the following tire related issues:
• Incorrect tire pressure
• Tire wear
• Uneven tread depth
• Incorrectly installed tire
• Mis-matched brand of tires
Copyright 2019 General Motors LLC. All Rights Reserved.
Page 2
March, 2019
Bulletin No.: 19-NA-064
First review the information in the latest version of Bulletin #00-03-10-003 (U.S.),
or #01-03-10-003 (Canada), to become acclimated to:
• The sections for “What is Covered” and “What is Not Covered.”
• What constitutes damage versus normal wear and tear.
• Examples of Non-Warrantable Conditions.
• Advise customers that they may be responsible for all, or possibly a pro-rated portion
of tire repairs.
In order to verify, or possibly rule out, the tires as the Cause of the above Condition, the
following recommendations are suggested:
Correction
⇒ Inspect all four tires for wear, uneven tread depth, an incorrectly installed tire
or mis-matched brand of tires. Correct tire pressure, or get authorization to
replace as necessary.
⇒ If none of the conditions above appear to be evident, first switch the front
tires to the rear to see if the pull goes away or is lessened. If so, get
authorization to replace those tires on the rear.
⇒ If the pull is still present, and if possible, get authorization to install four tires
and wheels from another vehicle, to see if the pull goes away.
Important: The regenerative braking system applies torque evenly to both axles while
braking in a straight line. Pulling to one side is not caused by the propulsion system.
⇒ If the tires have been confirmed to be good, then follow further diagnostics
in SI.
Version
1
Modified
Released March 22, 2019
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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