The gearbox has a valve that can wear and cause the wheels to lock-up while driving. According to the NHTSA, 115 lock-up incidents and one accident have been reported. Update: We reached out to GM ...

Affected owners will be notified starting next month and can get new transmission control software that will detect excessive safety valve wear and prevent wheel lock-ups.

A weakened transmission valve can cause the vehicle’s wheels to lock in place momentarily while driving. General Motors said the wheel lock can increase the risk of a crash. According to the ...