General Motors will be contacting the owners of certain 2020-2021 Buick Encore GX , 2020 Cadillac CT4, CT5 and XT4, 2020 Chevrolet Corvette and 2021 Chevrolet Trailblazer vehicles because of a problem affecting the electronic brake boost system.

According to the defect report, a connector in the system may have become contaminated during the manufacturing process. The contamination could interrupt the communication between the sensor and the system, under certain conditions. If communication is interrupted, electronic brake assist could be lost and the driver will require extra pedal force to stop the vehicle. Drivers may also notice an illuminated brake warning light in the instrument panel and the vehicle speed may be limited.

Owners receiving notices will be asked to return to their dealers to have the electronic brake boost module replaced. GM’s number for this recall is A202307260 and the NHTSA campaign number is 20V-588.