22-NA-136

Bulletin No.:
Service Bulletin
Date:
22-NA-136
November, 2023
TECHNICAL
Subject:
Intermittent Check Engine Lamp On with Various DTCs Set
Brand:
Model:
Buick
Enclave
Cadillac
Chevrolet
GMC
Model Year:
from
to
2021
2022
VIN:
from
to
Engine:
Transmission:
XT5
XT6
Blazer
Traverse
Acadia
Involved Region or Country
United States, Canada, Mexico, Uzbekistan, Russia, Middle East, Israel, Palestine, Chile
(West), Colombia (West), Ecuador (West), Peru (West), Japan, Cadillac Korea (South
Korea), Other Africa
Additional Options (RPOs)
Condition
Some customers may comment on a Check Engine Lamp being illuminated intermittently.
Technicians may find various DTC’s set: U18C6, U18D2, U240E, U0076, U18A2, U18C6.
Cause
The cause of the condition may be a possible poor connection or backed out terminal in a
connector on the Console to Body wiring harness.
1. Gain access to the Console to Body Wiring Harness, refer to Inline Harness
Connector End Views in SI, to determine the proper harness connector.
Note: Each vehicle is different, using the VIN refer to SI for the proper procedure.
Correction
Copyright 2023 General Motors LLC. All Rights Reserved.
2. Visually inspect all wires to ensure that they are properly seated in the console side
connector body.
3. Separate connector and verify that there is no damage to any of the terminals.
4. Verify proper pin tension using the Terminal test kit.
5. If any issues are found with the terminals, repair as needed using terminated leads.
Refer to Terminated Lead Repair in SI.
6. Reconnect connector and verify that the CEL is not lit.
7. Test drive to ensure condition is corrected.
Note: If the console side of the harness has backed out terminals or is damaged, repair
the backed out terminal or replace the console harness as needed. See Parts Catalog for
correct part number. If the body side of the connector or terminals are damaged, repair
with connector body 13597186 or appropriate terminated lead(s).
Page 2
November, 2023
Bulletin No.: 22-NA-136
Service Procedure
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.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
CONNECTOR,
WRG HARN
13597186
1
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
*5486328
Repair or Replace Console to Body Wiring Harness
0.5 hr
*This is a unique Labor Operation for Bulletin use only.
Version
1
Modified
Released November 17, 2023
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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