2020 Cadillac CT6

The defect

General Motors LLC (GM) is recalling certain 2019-2020 Cadillac CT6, 2020-2021 CT4, CT5, and 2020-2022 Chevrolet Camaro vehicles equipped with a 10-speed transmission. The transmission may become damaged internally and cause the wheels to lock-up.

The risk

Wheel lock-up while driving increases the risk of a crash.

The remedy

Dealers will install transmission control module monitoring software, free of charge. Owner notification letters were mailed April 7, 2025. Owners may contact Cadillac customer service at 1-800-333-4223 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N242480630.

General Motors, LLC · up to 90,081 vehicles across all model years covered

The defect

General Motors LLC (GM) is recalling certain 2020 Cadillac CT6 vehicles equipped with dealer-installed accessory 20" x 8.50" wheels (RPO 5JO or SHH). The tire pressure monitoring system (TPMS) sensors use the incorrect wireless radio frequency and cannot illuminate the low pressure warning light when the tire pressure drops below the recommended level. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring Systems."

The risk

Drivers may drive the vehicle with low tire pressure without a low tire pressure warning, negatively impacting the vehicle handling and increasing the risk of a crash.

The remedy

GM will notify owners, and dealers will replace all four TPMS sensors with the correct sensors, free of charge. The recall began December 3, 2019. Owners may contact GM customer service at 1-586-596-1733. GM's number for this recall is N192279200.

General Motors LLC · up to 81 vehicles across all model years covered

crash · 15,300 miles

ON FRIDAY, NOVEMBER 13, 2020 I WAS STOPPED AT A STOPLIGHT IN MARYSVILLE, OHIO. IT APPEARED THAT TRAFFIC STARTED TO MOVE, SO I TOOK MY FOOT OFF THE BRAKE. ALMOST IMMEDIATELY THE EMERGENCY BRAKING FEATURE ENGAGED. WHILE THIS TENDS TO STARTLE YOU BECAUSE IT IS SO ABRUPT, ALMOST LIKE A HEAD-ON COLLISION, I PRESSED ON THE BRAKE. THE BRAKE DID NOT STOP THE CAR. IT WAS SIMILAR TO WHEN ANTI-LOCK BRAKING IS ENGAGED. THE BRAKES FELT LIKE THEY WERE PULSATING, SO THE CAR CONTINUED TO MOVE FORWARD UNTIL IT PRESSED UP AGAINST THE CAR IN FRONT OF ME. I HAVE HAD SOME INSTANCES WHERE WHEN BACKING UP, IN A COMPLETELY EMPTY PARKING LOT OR STREET AND THE CAR WILL BRAKE ON ITS OWN. THERE ARE NO POSTS, TREES OR …

NHTSA complaint 11374732, quoted in part. Filed by an owner and not verified by NHTSA or by us.

towed · 98,000 miles

The contact owns a 2020 Cadillac CT6. The contact stated while driving 65 MPH, the transmission seized, and the vehicle was coasted over to the right side of the roadway while waiting for tow service. A dealer as contacted. The vehicle was towed to the dealer where it was diagnosed with transmission failure. The vehicle was not repaired. The manufacturer informed the contact that the vehicle was out of warranty. The contact related the failure to NHTSA Campaign Number: 25V148000 (POWER TRAIN); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact was referred to …

NHTSA complaint 11673799, quoted in part. Filed by an owner and not verified by NHTSA or by us.

The vehicle was shifting harshly and my wheels were experiencing lock up while in motion which was very dangerous. I experienced this on the parkway as well as streets and almost had a few accidents due to this problem. I drive my wife and children in this vehicle. Our safety and lives were put at risk. There were no warning lamps to advise of troubles. I also have some computer problems that are supposed to be addressed. Gm dealer has had my car for four months and have tried to replace valve four times and all four times the part they received was defective and unsuccessful. I have made many calls to GM and they are giving me the run around. Now they want to replace the entire …

NHTSA complaint 11690488, quoted in part. Filed by an owner and not verified by NHTSA or by us.

The contact owns a 2020 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that while his wife was driving at an undisclosed speed, the vehicle jerked before slamming into gear. No warning lights were illuminated. In addition, the contact stated that the transmission was shifting rough. The vehicle was taken to the dealer; however, the vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that the failure persisted. The manufacturer was made aware of the …

NHTSA complaint 11667446, quoted in part. Filed by an owner and not verified by NHTSA or by us.

64,000 miles

The contact owns a 2020 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (Power Train); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that the transmission was shifting hard. The dealer was contacted. The manufacturer was not made aware of the issue. The failure mileage was approximately 64,000. VIN tool confirms parts not available.

NHTSA complaint 11666008. Filed by an owner and not verified by NHTSA or by us.

See attached document for complaint.

NHTSA complaint 11662581. Filed by an owner and not verified by NHTSA or by us.

The contact owns a 2020 Cadillac CT6. The contact received notification of NHTSA Campaign Number: 25V148000 (POWER TRAIN); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

NHTSA complaint 11654171. Filed by an owner and not verified by NHTSA or by us.