GMC Sierra 3500, Sierra 2500 +1 more: Power train — software

Affects GMC Sierra 3500, Sierra 2500, Sierra 1500 · 2020–2022 — about 1K vehicles.

The hazard

Rear wheel lock up increases the risk of a crash.

What to do

Dealers will inspect the vehicles and update the transmission control software, free of charge. Owner notification letters were mailed March 6, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N252516560. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 12, 2026.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational