Bulletin No.:

Service Bulletin

Date:

13-03-10-001H
May, 2021

INFORMATION
Subject:

Information on Summer Tire Performance and Tire Cold Weather Cracking

Models:

2012-2017 Buick Regal GS
2014-2015 Cadillac CTS Vsport
2016-2019 Cadillac ATS-V, CTS-V
2020-2021 Cadillac CT4-V, CT5-V
2012-2015 Chevrolet Camaro ZL1
2013-2015 Chevrolet Camaro SS with RPO 1LE
2014-2015 Chevrolet Camaro Z/28
2016-2021 Chevrolet Camaro SS, ZL1 and 1LE (RPO A1X, A1Y, A1Z)
2014-2017 Chevrolet SS
2014-2019 Chevrolet Corvette, Z06, Grand Sport, ZR1
2020-2021 Chevrolet Corvette with Z51 Performance Package

Attention: Advise customers of these vehicles that they are equipped with a high performance
summer-only tire that will have reduced traction performance at temperatures below
approximately 40°F (5°C). GM recommends installing winter tires if driving below these
temperatures. Avoid driving, moving, or test-driving vehicles equipped with high
performance summer-only tires below 20°F (−7°C), as operating at these temperatures
can cause damage to the tires. This bulletin also applies to any of the above models
that may be Export vehicles.
This bulletin has been revised to add the 2014-2019 base Corvette to Models, Corvette Grand
Sport to 2014-2019 Corvette section title, 2021 Corvette with Z51 Performance Package and
the 2020-2021 Cadillac CT4-V and CT5-V Models and tire information. Please discard
Corporate Bulletin Number 13-03-10-001G.

Cold Weather Operation
The vehicles referenced above are all equipped with 3
season performance tires commonly referred to as
“Summer Tires.”
The rubber used in these tires loses flexibility and may
develop surface cracks (1) in the tire tread/shoulder
area at colder temperatures. Refer to the photos below
for examples.

Copyright 2021 General Motors LLC. All Rights Reserved.

Surface cracks are cosmetic and will not result in a loss
of air, however special tread and compounds used on
these performance tires will cause a decrease in
performance in cold climates. Driving with high
performance summer tires on snow, ice or cold road
surfaces may cause loss of control.
Important: While the cracking will not result in air loss,
it is damaging to the tire. Tires that have been used in
cold climates and exhibit tread cracks should be
discarded.

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May, 2021

Bulletin No.: 13-03-10-001H

cold climate operation. Additionally, dealers in the
United States may call the GM Tire Program at
877-728-4737 for help with late season tire availability
or substitutions.

Tire Surface Cracks

3274901

3701321

2014-2015 Cadillac CTS Vsport
The 2014 and 2015 Cadillac CTS Vsport is equipped
with 245/40R18 and 275/35R18 Pirelli P-Zero Nero
(RPO RKK) ultra-high performance summer tires.
Please advise customers that this vehicle is equipped
with an ultra-high performance summer tire that will
have reduced traction performance at temperatures
below approximately 5°C (40°F). GM recommends
installing winter tires if driving below these
temperatures.
Avoid driving, moving, or test-driving CTSs
equipped with Pirelli P-Zero Nero (RPO RKK) tires
below -7°C (20°F) as operating at these
temperatures can cause damage to the tires.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for

2020-2021 Cadillac CT4-V and CT5-V
The 2020 and 2021 Cadillac CT4-V and CT5-V are
equipped with 235/40R18 (Q4C) and 245/40Z19 (QBK)
summer tires.
Please advise customers that these vehicles are
equipped with a summer tire that will have reduced
traction performance at temperatures below
approximately 5°C (40°F). GM recommends installing
winter tires if driving below these temperatures.
Avoid driving, moving, or test-driving these vehicles
with these tires below -7°C (20°F) as operating at these
temperatures can cause damage to the tires.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for
cold climate operation. Additionally, dealers in the
United States may call the GM Tire Program at
877-728-4737 for help with late season tire availability
or substitutions.
2012-2015 Camaro Models RPO (ZL1, 1LE or Z28);
2016-2021 Camaro SS, ZL1 and 1LE
2012-2015: The Camaro ZL1 and RPO 1LE vehicles
come with 285/35ZR20 and/or 305/35ZR20 Goodyear
F1 Supercar G2 D.O.T. approved ultra high
performance, track capable summer tires as standard
equipment.
2014-2015: The Camaro Z/28 is equipped with 305/
30ZR19 Pirelli P Zero Trofeo R of similar capabilities.
2016-2021: The SS, ZL1 and models equipped with
1LE package (RPOs A1X, A1Y or A1Z) are equipped
with Summer tires. These tires (RPOs R0F, R0G and
R6O) have reduced capability below 5°C (40°F) and it
is recommended that suitable winter tires be fitted
below this temperature.
All of these Camaro models tires are not intended to be
driven on snow, ice or road surfaces below -7°C (20°F).
For ZL1, Z28 and SS 1LE - If the ambient temperature
in your location is at or below -7°C (20°F), DO NOT
MOVE THIS VEHICLE. Driving the vehicle when the
temperature is below -7°C (20°F) may result in surface
cracks in the tread area of the tire.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for
cold climate operation.
2014-2019 Corvette, Corvette Z06, Corvette Grand
Sport, Corvette ZR1; 2020-2021 Corvette with Z51
Performance Package
The 2014-2019 Corvette is equipped with Michelin Pilot
Super Sport ZP Runflat tires or Michelin Pilot Sport Cup
2 ZP tires. The 2020-2021 Corvette with the Z51
Performance Package is equipped with Michelin Pilot
Sport 4S ZP run flat tires. These tires are ultra high
performance, track capable summer tires.

Bulletin No.: 13-03-10-001H

May, 2021

These tires have reduced capability below 5°C (40°F)
and it is recommended that suitable winter tires be
fitted below this temperature.
Avoid driving, moving, or test-driving Corvettes
equipped with Michelin Pilot Super Sport ZP and
Pilot Sport 4S ZP tires below -7°C (20°F) as
operating at these temperatures can cause damage
to the tires.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for
cold climate operation.
2014-2017 Chevrolet SS
The 2014−2017 SS is equipped with Bridgestone
ultra-high performance summer tires.
This tire has reduced capability below 5°C (40°F) and it
is recommended that suitable winter tires be fitted
below this temperature.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for
cold climate operation.
2012-2017 Buick Regal GS, 2016-2017 Cadillac
ATS-V and CTS-V
The 2012-2017 Regal GS, 2016-2017 Cadillac ATS-V
and CTS-V are equipped with ultra-high performance
summer tires.
This tire has reduced capability below 5°C (40°F) and it
is recommended that suitable winter tires be fitted
below this temperature.
Refer to the latest version of Service Bulletin
#04-03-10-013: Driving Characteristics of Rear Wheel
Drive Vehicles and Available Winter Tires for further
information on available replacement winter tires for
cold climate operation.

Tire Storage
It is recommended that Summer tires are stored
indoors at temperatures above -7°C (20°F) when not in
use. If the tires have been subjected to -7°C (20°F) or
less, let them warm up in a heated space to at least 5°C
(40°F) for 24 hours or more before being installed or
driving a vehicle on which they are installed. Inflate the
tires only after they have been warmed above 5°C (40°
F). Do not place tires near heaters or heating devices
used to warm the room where the tires are stored. Do
not apply heat or blow heated air directly on the tires.
Always inspect tires before use after being stored.

Customer Information
Please share this information with the customer,
including a copy of this bulletin.

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