Transport CanadaHigh Risk
1991 GMC SONOMATransport Canada Recall #1999135
The official notice
Defect
Certain four wheel drive vehicles may experience increased stopping distances during ABS stops while in the two-wheel drive mode. A switch can erroneously signal the ABS system that the vehicle is in four-wheel drive when the vehicle is actually in two wheel drive.
Safety Risk
No risk description available.
Remedy
Dealers will replace the switch on affected vehicles.
72,445 vehicles affectedMfr ref: 99041Updated June 10, 2026