It is possible that the Cadillac CT6 could also be at risk.
General Motors’ light-duty pickup trucks are in trouble. GM is currently in contact with owners of 2019 GMC pickup trucks about possible brake failure. The issue could also affect Cadillac CT6owners. A brake failure can be a serious concern for any vehicle, including a sedan or pickup truck. All 128,519 vehicles may be affected.
This problem is actually caused by a previous brake recall on December 12, 2019. This recall (NHTSA campaign number 188890000) was issued in order to correct a software issue that could lead to the anti-lock or stability control systems failing. This recall was applicable to 463,995 vehicles, including the GMC Sierra and Chevrolet Silverado. It applies to all models starting in 2019. It was a simple reprogramming the Electronic Brake Control module (EBCM).
It appears that the software update may have had unexpected consequences. This could not only affect the safety or anti-lock system, but also the overall functionality of the brakes. A report by the Detroit Free Press suggests that the software update could have had an impact on how the OnStar remote-start function and brake systems communicate. This could lead to brake failure.
Motor1.com received this email from a spokesperson for GM.
GM has notified dealers that it has updated the software calibration used to complete a Non-Compliance Field Action GM filed with NHTSA this December on certain 2019 Chevrolet Silverado full-size pickups and Cadillac CT6 because of a possible degradation in braking performance. The revised repair will see dealers re-flash vehicles’ electronic brake controller module (ECBM), with a new calibration to resolve the original issue and address the complaints.
We are sorry for any inconvenience caused to our customers. They will have to return to the dealership to receive additional service. Safety of our customers is our top priority.
GM acted quickly to investigate and recall affected vehicles. We know of no fatalities, injuries or accidents related to this recall.
GM is reportedly working with more than 1,700 owners to resolve problems. A new recall is being prepared for approximately 128,519 vehicles which were subject to the previous recall. Although the NHTSA was also notified, a recall notice for approximately 128,519 vehicles that had been subject to the prior recall has not yet been posted on their website as of February 6.
Several complaints regarding brake failures, including partial or complete, have been received by the NHTSA since the December initial recall. Some of these complaints were tied to OnStar functionality. The Free Press article also cites several organizations and individuals who feel that the automaker should have acted sooner to inform the public about the potential problem.