The problem
General Motors LLC (GM) is recalling certain 2018 GMC Terrain vehicles. The sensing diagnostic module (SDM) that senses a crash and deploys the necessary air bags may not power down correctly when the vehicle is shut off, causing it to be inoperative when the vehicle is restarted.
The risk
If the SDM becomes inoperative, it will not detect a crash or command the necessary air bag deployment, increasing the risk of injury in the event of a crash.
The fix
GM will notify owners, and dealers will reprogram the SDM with updated software, free of charge. The recall began June 29, 2018. Owners may contact GMC customer service at 1-800-462-8782. GM's number for this recall is 18179.
Recall details
| NHTSA campaign | 18V-340 (18V340000) |
|---|---|
| Manufacturer number | 18179 |
| Manufacturer | General Motors, LLC |
| Component | Air bags › Air bag/restraint control module |
| Report date | May 24, 2018 |
| Owners notified | June 29, 2018 |
| Vehicles affected | 88,503 |
| Initiated by | Manufacturer |
Vehicles covered
Owner complaints about the air bags
Frequently asked questions
Is the recall 18V-340 repair free?
Yes. GMC dealers will fix the problem at no cost: GM will notify owners, and dealers will reprogram the SDM with updated software, free of charge. The recall began June 29, 2018. Owners may contact GMC customer service at 1-800-462-8782. GM's number for this recall is 18179.
How do I know if my car is included?
Not every vehicle of the listed model years is affected — the recall covers 88,503 vehicles built in a certain window. Check your 17-character VIN with our VIN recall check or at nhtsa.gov/recalls.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.