19NA078

Service Bulletin
Bulletin No.:
19-NA-078
Date:
June, 2020
WARRANTY ADMINISTRATION
Subject:
Premature or Accelerated Tire Wear On Vehicles Equipped with Various Sizes of
Michelin Premier LTX Tires
This Bulletin is replacing 18-NA-274. Please discard 18-NA-274.
Brand:
Model:
Buick
Envision
Cadillac
XT5
Chevrolet
GMC
Model Year:
from
2017
to
Breakpoint:
from
to
-
-
Engine:
Transmission:
2020
Equinox
2018
Blazer
2019
2020
Acadia (VIN N)
2017
2017
Acadia
2018
2019
Terrain
2018
2020
-
-
Involved Region or Country
North America
Additional Options (RPOs)
Equipped with Michelin Premier LTX TIRE ALL- 225/65R17 102H 1467MS , 225/60R18
SL 100H BW AL3 ,TIRE ALL-235/65R18 SL 106H BW AL3 VAR1 , TIRE 245/65R17
107H 1491MS, TIRE 235/55R20 102H 1493MS (RPOs 5CX, RUB, QMV, QML, QNU)
Condition
Some customers may comment their tires are not meeting tread depth expectations, or
wearing out (reaching 2/32 in (1.6 mm)) too quickly.
This condition may be caused by vehicle alignment issues and/or normal tire
performance attributes.
For specific tire sizes, there is a new, alternative GM Approved tire available. Please note
the additional information and specifications later in this bulletin.
Cause
Copyright 2020 General Motors LLC. All Rights Reserved.
⇒ Modern tire compounds in these tires provide increased performance levels
throughout its service life, delivering higher levels of grip even when partially
worn. Due to these compound changes, vehicle mileage at the time the tires
show 4/32 in (3.2 mm) may be less than what customers have experienced
with other tires.
Page 2
Correction
June, 2020
Bulletin No.: 19-NA-078
Step 1
If vehicle exhibits lead or pull symptoms, and mileage is below 12,000 miles (19,000 km),
check the vehicle alignment to ensure it is within acceptable range.
If a vehicle with less 12,000 miles (19,000 km) exhibits these symptoms and the
alignment requires adjustment to meet GM specification, the dealership is to properly
align the vehicle and submit a warranty transaction using Labor Code 8070032 Wheel
Alignment Measurement. This exception applies only to vehicle/tire combinations
specified in this bulletin. For all others, continue to follow normal warranty policies limiting
alignment coverage up to 7500 miles (12,000 km).
Step 2
If the vehicle tires measure 4/32 in (3.2 mm) or less, customers within the Bumper to
Bumper warranty (Canada Base Warranty) may be offered replacement tires on a
pro-rated basis. Please utilize the pro-ration chart below, unique to the applicable vehicle/
RPO combinations found in this bulletin. DO NOT use the pro-ration chart found in the
vehicle owner’s manual.
• Tire replacement under warranty does not apply to situations outside of this bulletin,
such as replacement necessitated by road damage, improper inflation, racing or flat
spotting.
• The special tire pro-ration chart provided in this bulletin only applies to premature tire
wear at 4/32 in (3.2 mm) or less, or tire wear resulting from alignment issues under
12,000 miles (19,000 km).
• There is a new, GM approved alternative tire with improved wear performance that is
available for the 17” Acadia RPO QML, 18” Acadia / XT5 RPO QMV, 20” Acadia / XT5
/ Blazer RPO QNU, 17” Equinox / Terrain RPO 5CX, and 18” Equinox/Terrain/Envision
RPO RUB. Please see below for additional information and specifications.
For Acadia / XT5 Blazer equipped with (RPO QML, QMV, QNU) tires: For customers
that want GM approved tires, though request an alternative service replacement tire,
there is another tire that may be offered as a replacement for the 18”size, the Continental
Cross Contact LX20 235/65R18 106H, TPC #3126MS (RPO QMX).
For customers that request replacement Michelin tires, there is a new, GM approved
service replacement tire with improved treadwear performance that is available for the
18” size, the Michelin Primacy Tour A/S 235/65/R18 106H, TPC #3176MS (RPO QMV).
When utilizing this alternative tire, please replace the tires in quantities of 4, tire models
(Primacy and Premier LTX) cannot be mismatched or have different tires on the same
vehicle.
For replacement of the 20” size, there is also a new, GM approved service replacement
tire with improved treadwear performance, the Michelin Primacy Tour A/S 235/55R20
102H, TPC# 3177MS (RPO QNU). When utilizing this alternative tire, please replace the
tires in quantities of 4, tire models (Primacy and Premier LTX) cannot be mismatched or
have different tires on the same vehicle.
There is a new, GM approved service replacement tire with improved treadwear
performance that is available for the 17” size (RPO QML). This tire is the Michelin
Primacy Tour A/S 245/65/R17 107H TPC# 3175MS. When utilizing this alternative tire,
please replace the tires in quantities of 4, tire models (Primacy and Premier LTX) cannot
be mismatched or have different tires on the same vehicle.
For Equinox / Terrain / Envision equipped with (RPO 5CX, RUB) tires:.
There is a new, GM approved service replacement tire with improved treadwear
performance that is available for the 18” size (RPO RUB). This tire is the Michelin
Primacy Tour A/S 225/60/R18 100H TPC 3174MS. When utilizing this alternative tire,
please replace the tires in quantities of 4, tire models (Primacy and Premier LTX) cannot
be mismatched or have different tires on the same vehicle.
For replacement of the 17” size there is also a new, GM approved service replacement
tire with improved treadwear performance, the Michelin Primacy A/S 225/65R17 102H
TPC# 3159MS (RPO 5CX). When utilizing this alternative tire, please replace the tires in
quantities of 4, tire models (Primacy and Premier LTX) cannot be mismatched or have
different tires on the same vehicle.
For ordering replacement tires noted above and below, please utilize the normal tire
distribution network. If there are any issues with obtaining replacement tires, please call
the GM Tire Program. (GM Tire Program 1-877-728-4737 (U.S.A dealers). In Canada,
please order through the GM National Account Tire Program. Refer to tire proration chart
unique to this bulletin.
NOTE:
– This bulletin is ONLY applicable to the Models, Model Years, equipped with the RPO’s
noted above.
– Tire replacement and applicable proration noted below should not be utilized until the
tread depth is at 4/32 in (3.2 mm) or less.
Bulletin No.: 19-NA-078
June, 2020
Page 3
– Tire tread depth measurements MUST be provided in the technician cause comments
of the transaction. Tires replaced under this bulletin may be subject to request of
return for engineering review as noted in the latest version of bulletin# 00-03-10-003 (in
Canada, bulletin# 01-03-10-003).
– This unique bulletin proration is only applicable to vehicles that have even treadwear,
and documented tire rotations performed.
– This bulletin is only applicable to treadwear performance complaints. All other
manufacturing defects refer to in the latest version of bulletin# 00-03-10-003 (in
Canada, bulletin# 01-03-10-003).
Service Procedure
Refer to Tire Dismounting and Mounting in SI.
Parts Information
Causal Part
N/A*
Description
Part Number
Michelin Primacy Tour A/S, (RPO QML)
245/65R17 BW 107H TPC 3175MS
(Acadia)
84752904
Michelin Primacy Tour A/S (RPO QMV)
235/65R18 BW 106H TPC 3176MS
(Acadia / XT5)
84752905
Continental Cross Contact LX Sport
(RPO QMX) 235/65R18BW 106H TPC
3126MS (Acadia / XT5)
84458189
Michelin Primacy Tour A/S (RPO QNU)
235/55R20 BW 102H TPC 3177MS
(Acadia / XT5 / Blazer)
84752906
Michelin Primacy A/S (RPO 5CX) 225/
65R17 BW 102H TPC 3159MS (Equinox
/ Terrain)
84337546
Michelin Primacy Tour A/S, (RPO RUB)
225/60R18 BW 100H TPC 3174MS
(Equinox / Terrain / Envision)
84727761
Qty
4
*For warranty transactions, DO NOT mark this/these parts as the Causal Part. Enter the word “Bulletin” in the Causal Part
Description free-flow text field.
Proration table for vehicles covered by a 3yr/36,000
miles bumper to bumper warranty (3yr/60,000 km
Canada Base Warranty)
U.S.A Mileage (mi)
Canada Kilometres (km)
Customer Participation
(Tire Cost Including
Markup)
Customer Participation
(Labor - Mount and
Balance)
0 – 12,000
0 – 19,000 km
0%
0%
12,001 – 15,000
19,001 – 24,000 km
20%
0%
15,001 – 20,000
24,001 – 32,000 km
25%
0%
20,001 – 25,000
32,001 – 40,000 km
33%
0%
25,001 – 30,000
40,001 – 48,000 km
42%
0%
30,001 – 36,000
48,001 – 60,000 km
50%
0%
36,000+
60,000+ km
100%
100%
Page 4
June, 2020
Bulletin No.: 19-NA-078
Proration table for vehicles covered by a 4yr/50,000
miles bumper to bumper warranty (4yr/80,000 km
Canada Base Warranty)
U.S.A Mileage (mi)
Canada Kilometres (km)
Customer Participation
(Tire Cost Including
Markup)
Customer Participation
(Labor - Mount and
Balance)
0 – 12,000
0 – 19,000 km
0%
0%
12,001 – 15,000
19,001 – 24,000 km
20%
0%
15,001 – 20,000
24,001 – 32,000 km
25%
0%
20,001 – 25,000
32,001 – 40,000 km
33%
0%
25,001 – 30,000
40,001 – 48,000 km
42%
0%
30,001 – 36,000
48,001 – 60,000 km
50%
0%
36,001 – 40,000
60,001 – 64,000 km
60%
0%
40,001 – 45,000
64,001 – 72,000 km
67%
0%
45,001 – 50,000
72,001 – 80,000 km
75%
0%
50,000+
80,000+ km
100%
100%
Warranty Information
Note: Tires replaced under warranty will continue to be
covered for the remaining portion of the New Vehicle
Limited Warranty. Proration charts would apply based
on the mileage accumulated from the time of the
installation of the replacement tire through the end of
the vehicle’s Bumper-to-Bumper Warranty term
(Canadian Base Warranty Item).
Note: Only select the Labor Operation that
corresponds with the repair performed.
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor Operation
Description
Labor Time
8080468*
Warranty Administration - Michelin / Uniroyal / BF Goodrich
Tire Replacement
0.4 hrs.
Add
To Replace - Each Additional
0.3 hrs.
8070032
Wheel Alignment Measurement
Use the Published Labor
Operation Time
*This is a unique Labor Operation for Bulletin use only.
Once a customer agrees to tire replacement and their
responsible proration amount, the dealer must
complete a Tire Pre-Repair Authorization (PRA). To
generate a Pre-Repair Authorization, go to the Main/
home page in GWM and select Search/Create a
Pre-Repair Authorization Document.
Bulletin No.: 19-NA-078
June, 2020
Page 5
Version
3
Modified
Released April 25, 2019
Revised January 17, 2020 – Revised to add 2020 Model Year and update the Part
Information including applicable information listed in the Bulletin.
Revised June 01, 2020 – Revised to add 2019 – 2020 Blazer and update information in
the Correction and Parts.
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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