The Adaptive Cruise Control (RPO KSG) may be inoperative on some 2019-2021 XT5, XT6, Blazer and Acadia models along with an Adaptive Cruise Control Temporarily Unavailable message on the Driver Information Center. The operation of the regular Cruise Control system is not affected.
TIP: Press and hold the Cancel button on the steering wheel controls to switch between regular Cruise Control and Adaptive Cruise Control. (Fig. 22)
Fig. 22
DTC U0422 (Invalid Data Received From Body Control Module) also may be set in the Electronic Brake Control Module (EBCM). Communication codes such as DTC U0422 will be set when a receiving device on the serial data communication network detects a discrepancy in information it receives from another device, causing its integrity to be questioned.
If these conditions are found, check for any concerns with the front seat belts, which may cause DTC U0422 to set.
Use GDS 2 to monitor the SDM data while buckling the front seat belts. Verify that the status of the driver’s and passenger’s seat belts change when buckled and unbuckled. If the status of the seat belts does not change when buckling the belts, diagnose any seat belt concerns prior to investigating any Adaptive Cruise Control conditions.
– Thanks to Dave Goodrow
