Transport CanadaHigh Risk
2018 GMC TERRAINTransport Canada Recall #2018279
The official notice
Defect
On certain vehicles, the Sensing Diagnostic Module (SDM), which controls the airbag system, may not shut down correctly when the vehicle is turned off. If this happens, the SDM may not work when the vehicle is started, making it unable to detect a crash or deploy the airbags, and increasing the risk of injury in a crash.
Safety Risk
No risk description available.
Remedy
Dealers will reprogram the SDM with updated software to correct this problem.
12,711 vehicles affectedMfr ref: 18179Updated June 10, 2026