2021 Buick Enclave

The harness connector to the left or right side roof rail air bag may have incompatible electrical terminals, identical to the issue affecting the Chevrolet Traverse on the shared C1XX platform. This manufacturing defect can prevent the side curtain airbags from deploying in a side impact or rollover crash.

NHTSA recall for 2021-2022 Buick Enclave. Dealers replace the harness connector to the roof rail air bags with a compatible connector, free of charge.

The 9-speed automatic transmission exhibits shuddering at light throttle between 25-50 mph, jerking at low speeds, and occasional harsh shifts. The vehicle may feel like it is hesitating or surging during normal city driving. Some owners report the transmission slipping or failing to engage reverse promptly.

Transmission fluid flush with updated GM-approved fluid. TCM recalibration and software update. Torque converter replacement for persistent shudder. In cases of internal failure, complete transmission replacement under powertrain warranty.

A known defect can cause a large hole to form in the exhaust pipe between the exhaust manifold and the muffler. This hole allows exhaust gases, including carbon monoxide, to potentially leak into the passenger compartment through the HVAC fresh air intake. The condition also causes decreased engine performance and a noticeably louder exhaust tone.

Replace the affected exhaust pipe section. Inspect the exhaust system for additional corrosion or damage. In some cases, the exhaust manifold gasket may also need replacement. Ensure all heat shields are intact and properly positioned.

Owners report brake pads and rotors wearing prematurely, sometimes before 20,000 miles. The brakes produce grinding and squealing noises, and pedal pulsation occurs when the rotors warp from heat. The issue is most pronounced on the front axle and may be related to caliper slide pin binding.

Replace brake pads and rotors. Clean and lubricate caliper slide pins. Inspect caliper pistons for proper retraction. For repeat occurrences, consider upgrading to premium ceramic pads and heavier rotors designed for the Enclave's weight.

Some owners experience intermittent loss of power steering assist, heavy steering effort, or a clunking noise when turning the steering wheel. The electric power steering system can fail momentarily, especially during low-speed parking maneuvers. A warning message may or may not appear on the driver information center.

Inspect the electric power steering motor and wiring connections. Update the steering control module software. Replace the steering gear or column assembly if the electric motor has failed. Check the steering intermediate shaft for wear that causes the clunking noise.

General Motors, LLC (GM) is recalling certain 2020-2022 Chevrolet Traverse and 2021-2022 Buick Enclave vehicles. The harness connector to the left or right side roof rail air bag may have incompatible electrical terminals, which could prevent the air bags from deploying in a crash.

Roof rail air bags that do not deploy as intended increase the risk of injury in a crash.

Dealers will replace the harness connector to the roof rail air bags, free of charge. Owner notification letters were mailed on April 29, 2022. Owners may contact Buick customer service at 1-800-521-7300 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N212352140.

General Motors, LLC (GM) is recalling certain 2021 Chevrolet Traverse and Buick Enclave vehicles. During service by dealers, certain vehicles may have received incorrect air bag calibration software that may affect frontal airbag deployment.

Air bags that do not deploy as intended can increase the risk of injury.

Dealers will update the air bag calibration software, free of charge. Owner notification letters were mailed on July 29, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020 and Buick customer service at 1-800-521-7300. GM's number for this recall is N212340220.