2020-2022 Chevrolet Silverado Recall 24V797: Lock-Up

Recall 24V797 covers 463,295 2020-2022 Chevrolet, GMC, and Cadillac diesel vehicles for transmission control valve failure. Software repair is free at franchised Chevrolet dealers.

What's wrong?

The transmission control valve body in these 2020-2022 diesel trucks and SUVs directs transmission fluid through the automatic transmission. That fluid pressure tells the transmission when to shift gears and keeps the internal valves moving in the right order. When the valve body works correctly, shifts feel controlled and power stays matched to vehicle speed.

On affected vehicles, excessive wear inside the valve body creates a fluid leak. That leak drops pressure inside the transmission, and certain valves move when they should not. The transmission then commands a harsh downshift, and the rear wheels can lock up.

Drivers can notice harsh shifting before the lock-up condition happens. After the updated control software is installed, the vehicle is designed to detect the condition, shift into fifth gear, turn on the service engine light, and show a reduced propulsion message until the next key cycle.

Who's affected?

The scope spans Chevrolet, GMC, and Cadillac pickup and SUV nameplates from 2020-2022, with the automatic transmission listed under both valve-body and software components.

A matching year, make, and model does not confirm inclusion. Check your VIN to confirm whether this recall applies to your specific vehicle.

What's the safety risk?

Rear wheel lock-up can increase the risk of a crash. Watch for harsh shifting. If you notice it, drive cautiously and call a Chevrolet dealer to schedule the recall repair soon. Repair is free at any franchised Chevrolet dealer.

What should I do?

1. Check your VIN to confirm your 2020-2022 Chevrolet Tahoe, Sierra 3500, Silverado 2500, Yukon Xl, Yukon, Sierra 2500, Sierra 1500, Silverado 3500, Silverado 1500, Suburban, Escalade Esv, or Escalade is included in this recall.
2. Contact a franchised Chevrolet dealer to schedule the free transmission-control-module software update that checks for the defective control valve linked to rear wheel lock-up.
3. Bring the recall notice if Chevrolet has mailed one. If not, reference recall number 24V797 when you call.
4. Ask the dealer whether the software found a defective control valve and whether special coverage applies to the transmission repair.
5. Drive with extra space until the repair is complete, and avoid hard acceleration or sudden stops when traffic allows.

What happens at the repair

At the dealer, a Chevrolet technician installs new transmission control module software at no charge. The software checks for signs that the transmission contains a defective control valve. If the software identifies that condition, GM's special coverage program covers the related transmission repair. Parts and labor for the recall software update are free. If you already paid for a related transmission repair, GM's standard reimbursement plan covers qualifying documented expenses. Contact GM customer service or ask the dealer service desk how to submit your paperwork.

Timeline

Frequently asked questions

More information

Source documents

• Download Quarterly Report (PDF) · RCLQRT
• Download Owner Notification Letter (PDF) · RCONL
• Download Recall Investigation Document (PDF) (PDF) · RCRIT
• Download Owner Notice (PDF) · RCMN
• Download Misc. Document (PDF) · RMISC
• Download Recall Document (PDF) (PDF) · RIONL
• Download Recall Acknowledgement (PDF) · RCAK
• Download Recall Report (PDF) · RCLRPT

This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →