Transport CanadaCritical
2002 GMC ENVOYTransport Canada Recall #2001253
The official notice
Defect
Certain (4 wheel-drive) Trailblazer and GMC Envoy vehicle. The calibration of the active transfer case control module may cause insufficient high speed gear engagement. If the gear is not engaged, the vehicle can roll when the transmission is in "park" and a crash could result without warning.
Safety Risk
No risk description available.
Remedy
dealers are to reprogram the active transfer case control module (ATCM) calibration to increase gear engagement.
4,631 vehicles affectedMfr ref: 01065Updated June 10, 2026