According to the stop-sale notice, a material used in a sensor connection in the electronic brake boost system in affected vehicles “may have been contaminated during the material supplier’s production process.” Contamination of the brake booster connections may cause “an interruption of communication between the sensor and the brake boost system under certain conditions,” the automaker says, which can impact braking performance.
Vehicles affected by this stop-sale notice include certain examples of the C8 Corvette Stingray, 2020-201 Buick Encore GX, 2021 Chevrolet Trailblazer and 2020 Cadillac CT4, CT5 and XT4. GM says it has already notified the National Highway Traffic Safety Administration (NHTSA) about an upcoming safety recall involving these vehicles that pertains to the brake booster problem. The GM campaign number for this forthcoming recall will be A202307260.
Owners of affected vehicles may observe a loss of power brake assist in their vehicle. Additionally, if the vehicle’s computer identifies a problem with the power brake assist, a warning light and/or message may appear on the instrument panel and vehicle speed may electronically be limited.
GM says a remedy for this problem is not yet available and /or a sufficient quantity of repair parts is not available at this time. A recall bulletin will be released when a solution is found, at which point owners will be instructed to make an appointment with their dealership. Dealers will be instructed to replace the electronic brake boost module in affected vehicles, which will be done at no cost to the owner. Customers who own a vehicle affected by this action can also expect to be notified of the recall campaign by mail.
Concerned owners can also search for recall actions or campaigns that be active on their vehicle by punching their VIN into the GM Owner Center website.
It’s currently not clear how long the stop-sale on affected vehicles, including the Chevrolet Corvette, will be active.