22-NA-247

Service Bulletin
Bulletin No.:
22-NA-247
Date:
April, 2023
INFORMATION
Subject:
Information on eBoost Applications (K160 Brake System Control Module) for False
DTC C05B0 Setting After a Brake Inspection, Brake Pad Replacement, or Any Other
Work that Would Require Caliper Piston to Be Reseated
Brand:
Model:
BrightDrop
EV600
Buick
2022
2022
Enclave
2020
2022
LaCrosse (China)
2020
Regal (China)
CT4
CT5
Escalade Models
2021
XT4
2019
Blazer
Corvette
Equinox
2020
2023
2021
2023
Silverado 1500 (New
Model)
2019
2019
Silverado 1500
2020
2021
2022
2022
2023
2023
2021
2023
Silverado 1500
Suburban
Tahoe
Copyright 2023 General Motors LLC. All Rights Reserved.
—
Transmission:
—
—
2020
Malibu (China)
Silverado 1500 New
(RPO J22, VIN Digit
5 = A / D)
—
Engine:
2023
Equinox (China)
Silverado 1500 LTD
(RPO J21, VIN Digit
5 = W / Y)
to
2020
2019
XT6
VIN Breakpoint:
from
2023
CT6
XT5
Chevrolet
to
Envision
Verano (China)
Cadillac
Model Year:
from
Page 2
Brand:
GMC
April, 2023
Model:
Model Year:
from
to
Acadia
2020
HUMMER EV
2022
Sierra 1500 (New
Model)
2019
2019
Sierra 1500
2020
2021
2022
2022
Sierra 1500 Limited
(RPO J21, VIN Digit
5 = 8 / 9)
Sierra 1500 New
(RPO J22, VIN Digit
5 = H / U)
Sierra 1500
Terrain
Yukon Models
2023
Bulletin No.: 22-NA-247
VIN Breakpoint:
from
to
—
—
Engine:
Transmission:
—
—
2023
2023
2021
Involved Region or Country
North America, China, Middle East, Australia/New Zealand
Condition
The purpose of this bulletin is to inform dealership personnel that after performing a brake
inspection, brake pad replacement, or any other repair that requires the caliper piston to
be re-seated may be causing DTC C05B0 to falsely set for eBoost applications.
Service Procedure
Important: This technical service bulletin (TSB) can
only be completed by certified repair facilities who have
met all specific training, tool and equipment
requirements pertaining to the vehicle Brand and Model
serviced. Repairs must be performed by a technician
who has successfully completed the required training.
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
Please refer to the diagnostic procedure for DTC
C05B0 and verify that there are no leaks in the any of
the brake components before proceeding onto the
following steps to correct DTC C05B0 from falsely
setting:
1. Disconnect the battery negative cable. Refer to
Battery Negative Cable Disconnection and
Connection in SI.
2. Ensure that the brake pads are fully seated to the
rotors and that the brake pedal is firm.
2.1. If the brake pedal is firm and the brake pads
are fully seated, continue onto step 3.
2.2. If the brake pedal is not firm and/or the brake
pads are not fully seated, gradually apply the
brake pedal to approximately 2/3 of its travel
distance. Wait 15 seconds and repeat until
the brake pedal is firm and brake pads are
fully seated. Proceed once brake pedal is firm
and brake pads are fully seated.
Note: If you are unable to achieve getting a firm brake
pedal and/or unable to fully seat the brake pads, stop
here and refer back to the diagnostic procedure for
DTC C05B0.
3. Reconnect the negative battery cable.
4. Clear DTC codes.
• If DTC C05B0 clears, everything is good.
• If DTC C05B0 resets, please refer back to the
diagnostic procedure in SI for DTC C05B0.
Bulletin No.: 22-NA-247
April, 2023
Page 3
Warranty Information
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
2086768*
eBoost Caliper Piston
Reseat
0.2 hr
*This is a unique Labor Operation for bulletin use only.
Version
2
Modified
Released December 06, 2022
Revised April 11, 2023 – Added Middle East and Australia/New Zealand to Involved
Region or Country section and added Warranty Information.
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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CERTIFICATION