General Motors is recalling more than 90,000 vehicles over a transmission control valve issue that can cause tires to lock up, the National Highway Traffic Safety Administration said.
The problem affects cars with 10-speed transmissions, the safety administration said. Over time, the transmission control valves in some of the vehicles can become susceptible to excessive wear, causing a loss of pressure within the valve that can result in harsh shifting, it said.
“In rare cases, the wheels may experience a momentary lock up," the administration said in a recall notice, increasing the risk of a crash.
The affected models are the 2020-21 Cadillac CT4, 2020-21 Cadillac CT5, 2019-20 Cadillac CT6 and 2020-22 Chevrolet Camaro.
Of the 90,081 cars potentially affected, 1% are estimated to have the defect, the NHTSA said.
In September, the driver of a 2021 Cadillac CT5 reported the car's front tires locked up, the agency said.
GM had previously looked into the issue, it said. Because the lock-ups generally lasted less than 150 milliseconds, the company determined that after no related accidents or injuries were reported, it wasn't enough time for the vehicle to lose control and closed the investigation, according to the safety administration.
The probe was reopened in November, with a GM investigator finding 115 reports of lock-ups, with one leading to an accident, the NHTSA said.
GM's Safety Field Action Decision Authority decided to conduct a safety recall on Feb. 27, the safety administration said.
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.
