NHTSA ID Number: 10178356
Manufacturer Communication Number: PIT5755
This Preliminary information communicates an issue with the Electronic Brake Control Module incorrectly mapping DTC U0126 as a U0131 and directs the dealership to follow the diagnostics for the U0126.
4 Affected Products
Bulletin No.: PIT5755
Published date: 06/26/2020
PIT5755 Diagnostic Tip – Service Stability System Message / MIL DTC U0131
Involved Region or Country
Some customers may comment on a Service Stability System Message. When checking for DTC’s, the K17
Electronic Brake Control Module (EBCM) may have a U0131 for of loss communication with the K43
Power Steering Control Module (PSCM). After checking the vehicle’s options it may or may not be
equipped with a K43 PSCM (RPO NV8).
This concern could be caused by the EBCM improperly mapping the DTC U0126 (Lost Communication With
B99 Steering Wheel Angle Sensor Module) as a U0131 (Lost Communication With K43 Power Steering
If the vehicle is NOT equipped with RPO NV8, then DTC U0131 is for a loss of communication with the
B99 Steering Wheel Angle Sensor Module. Follow the appropriate SI wiring diagrams and diagnostics
for U0126 (Lost Communication With B99 Steering Wheel Angle Sensor Module).
If the vehicle is equipped with RPO NV8, then DTC U0131 could be for a loss of communication with
the K43 Power Steering Control Module or a loss of communication with the B99 Steering Wheel Angle
Sensor Module . To help determine if the U0131 is set for a loss of communication with the K43 PSCM
or the B99 Steering Wheel Angle Sensor Module use the Data Bus Diagnostic Tool. The K43 PSCM
should be communicating on both the High Speed GMLAN bus pins 6 and 14, as well as, the Chassis
High Speed bus pins 12 and 13. The B99 Steering Wheel Angle Sensor Module will only be on the
Chassis High Speed bus pins 12 and 13.
Note: Engineering is aware of this incorrect mapping of the DTC’s.
The correction for this concern may be one of several repairs. For vehicles repaired under
warranty, please use the appropriate warranty labor operation based on the actual cause and repair.
Modified 06/26/2020 – Created on.
1 Associated Document
Bulletin No.: PIT5755
Published date: 06/26/2020
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Last update on 2020-10-23 / Affiliate links / Images from Amazon Product Advertising API
Last update on 2020-10-23 / Affiliate links / Images from Amazon Product Advertising API