Product Safety Recall
Momentary Rear Wheel Lock-Up
Released: 2024-10-24
GM Program #
N242454440
Status
Incomplete. Remedy not available
NHTSA
24V797
Date Issued:
2024-10-24
Description
General Motors has decided that a defect which relates to motor vehicle safety may exist in certain: 2020 – 2022 model year Chevrolet Silverado 1500/2500/3500 and GMC Sierra 1500/2500/3500; and 2021 model year Cadillac Escalade and Escalade ESV, Chevrolet Suburban and Tahoe, and GMC Yukon and Yukon XL vehicles equipped with diesel engines. A transmission control valve in some of these vehicles may be susceptible to excess wear over time, resulting in a gradual loss of pressure within the valve that can cause harsh shifting. In rare cases, the rear wheels may experience a momentary lock up.
Safety Risk Description
If the rear wheels lock-up momentarily while driving, there is increased risk of a crash.
Repair Description
Dealers will install new transmission control module software that will monitor valve performance and detect excess wear approximately 10,000 miles (16,000 km) before a wheel lock up condition could occur. Once detected, the transmission will be limited to fifth gear, preventing the possibility of a wheel lock up condition, which occurs in a downshift from eighth gear. A service engine light and reduced propulsion message will also display in the instrument panel.
