General Motors is recalling Chevrolet, Cadillac, Buick and GMC vehicles over an issue with the brake system that could increase the risk of a crash.
The defect: affected models are equipped with rear brake caliper pistons that may have an insufficient coating, causing gas pockets to form, potentially reducing rear brake performance (creating a soft or spongy feel when the driver depresses the brake pedal).
According to GM, the manufacturer of the brake pistons failed to properly chrome and temper the brake pistons during the manufacturing process. The condition can cause hydrogen gas to remain trapped in the piston body.
Affected vehicles: 2018-2019 model year: Buick LaCrosse, Cadillac XTS, GMC Terrain, Chevrolet Bolt EV, Chevrolet Cruze, Chevrolet Equinox, Chevrolet Impala, Chevrolet Malibu, and Chevrolet Volt.
Number of vehicles affected: 230,000, with 210,628 vehicles in the U.S and 19,385 vehicles in Canada.