2021 Chevrolet Blazer

The driver's seat cushion frame may have an improper weld in the power tilt-adjustment mechanism. An improperly welded seat frame may not adequately restrain the driver in a crash, increasing the risk of injury. The defect is not visible during normal use and can only be identified through inspection.

NHTSA recall for 2022 Blazer. Dealers inspect the driver's seat and replace the cushion frame as necessary, free of charge.

The 9-speed automatic transmission can suffer from premature internal failure, with at least one reported case of complete transmission failure at only 13,000 miles. Owners report harsh shifting, delayed engagement, shuddering, and slipping. The transmission may enter a limp mode, limiting the vehicle to a single gear.

Transmission fluid service and TCM software update as a first step. Torque converter replacement for shudder symptoms. Complete transmission replacement for internal failures. GM may cover replacement under powertrain warranty if within coverage period.

Owners report a range of electrical problems including dashboard display failures, infotainment freezing, car alarm triggering without cause, gear shift position errors, and sudden power loss while driving. Some owners have experienced electrical fires, though these are rare. The body control module appears to be a common failure point.

Dealer diagnoses and updates BCM and other control module software. Replace the BCM if corrupted. Inspect wiring harnesses for chafing or corrosion. Replace the 12V battery if it is the source of voltage irregularities.

Several owners report a loss of brake pressure resulting in significantly reduced braking power. The brake pedal may feel soft or travel excessively before the vehicle begins to slow down. This condition can occur intermittently and is extremely dangerous, especially in emergency stopping situations.

Inspect the brake hydraulic system for leaks. Replace the brake master cylinder or brake booster if faulty. Bleed the brake system to remove air. Check the electronic brake pressure modulator valve. Reference NHTSA recall 22V137000 for brake pressure modulator valve leak issues on related C1XX platform vehicles.

The automatic engine stop/start system can exhibit erratic behavior, including failing to restart the engine promptly when the brake is released, restarting with a harsh jolt that shakes the vehicle, or refusing to activate the stop feature in appropriate conditions. Some owners report the engine failing to restart after an auto-stop event.

Battery and charging system test to ensure the 12V battery meets the requirements for stop/start operation. Replace the battery with the correct AGM battery if needed. ECM software update to improve stop/start calibration. Inspect the enhanced starter motor for wear.

General Motors, LLC (GM) is recalling certain 2020 Chevrolet Bolt EV and 2021 GMC Canyon and Sierra 1500, 2500 and 3500, Yukon, Yukon XL, Cadillac Escalade and Escalade ESV and Chevrolet Blazer, Camaro, Colorado, Equinox, Silverado 1500, 2500 and 3500, Suburban and Tahoe vehicles. Incorrect bolts may have been used at one or more fastening locations to secure the seat belts to the vehicle. If an incorrect bolt was used, the seat belt may not be properly attached to the vehicle.

If a seat belt assembly is not properly attached to the vehicle, the seat belt may not properly restrain an occupant in the event of a crash, increasing the risk of injury.

GM will notify owners, and dealers will replace the suspect bolts, free of charge. The recall began January 29, 2021. Owners may contact GMC customer service at 1-800-462-8785, Cadillac customer service at 1-800-458-8006, or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N202322230.