Chevrolet Express and GMC Savana transmission software causes wheel lockup

NHTSA campaign 24V839000 · Reported 2024-11-07 · General Motors, LLC

critical How serious is it? About this label

Serious, because the van can lock its rear wheels or move unexpectedly with no warning, so get the software updated right away; the notice does not tell owners to stop driving.

What's wrong, in plain English

The computer that controls the transmission was loaded with the wrong software. Because of that, the van can shift harshly, lose power, slow down on its own, suddenly lock up the rear wheels, or move in a direction you did not select. Locking rear wheels or unexpected movement can make you lose control and crash. Dealers will reload the transmission control module with the correct software, free of charge, which fixes the problem.

What you should do

1. Enter your VIN at nhtsa.gov/recalls to confirm your van is part of recall N242471620.
2. Call your dealer or GM at 1-888-988-7267 (Chevrolet 1-800-222-1020, GMC 1-800-462-8782) to book the update.
3. Have the transmission control software reloaded — it is free of charge.

Affected vehicles (1)

2023 Chevrolet Express

Who to contact

Chevrolet — official Chevrolet recall lookup

Customer service: 1-800-222-1020

Any franchised dealer for the brand can do the repair. Phone numbers are taken from manufacturer sites and recent NHTSA notices; if one has changed, the number in your own recall letter is the one to use.

The bigger picture

Chevrolet power train recalls: locking rear wheels and broken driveshafts · all 15 Chevrolet recalls in this area

Official notice

Component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE
Summary: General Motors, LLC (GM) is recalling certain 2022-2023 Chevrolet Express and GMC Savana vehicles. Incorrect software in the transmission control module (TCM) may result in harsh shifting, reduced power, unintended deceleration, rear wheel lockup, or cause the vehicle to move in an unintended direction.
Safety risk: Rear wheel lock-up or moving in an unintended direction can increase the risk of a crash.
Remedy: Dealers will update the transmission control module software calibration, free of charge. Owner notification letters were mailed December 9, 2024. Owners may contact GM customer service at 1-888-988-7267, Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-800-462-8782. GM's number for this recall is N242471620.

Verify your specific vehicle by VIN at nhtsa.gov. Recall repairs are free of charge by law.