general problems of the 2018 GMC Terrain

12 problems related to air bag have been reported for the 2018 GMC Terrain. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 GMC Terrain based on all problems reported for the 2018 Terrain.

1 Air Bag problem

Failure Date: 03/13/2026

My car was t-boned on the driver side and no airbags deployed. The outer door and window exploded with the force. We were also hit from behind.

2 Air Bag problem

Failure Date: 10/29/2025

My car said to me this not that there is something wrong with the service safety restraint system! it was fine last night when I got home! I just bought this car a month ago and everything was fine and now my air bag light is on and will not go off!.

3 Air Bag problem

Failure Date: 10/03/2025

The contact owns a 2018 GMC Terrain. The contact stated while driving at an undisclosed speed, the air bag and abs warning lights illuminated. The vehicle was taken to auto zone to be diagnosed. The vehicle was diagnosed with air bag failure. The contact was informed that the air bag needed to be replaced. The vehicle was not repaired. The dealer was made aware of the failure; however, the contact was informed that there were no open recalls on the VIN. In addition, the contact was informed that once a recall repair was completed, it would not be performed a second time free of charge. The manufacturer was not made aware of the failure. The failure mileage was approximately 95,100.

4 Air Bag problem

Failure Date: 12/16/2024

The contact owned a 2018 GMC Terrain. The contact stated that while driving and nearly coming to a complete stop in the right lane, another vehicle driving approximately 40-50 mph crashed into the rear of the vehicle, causing the contact to hit her face against the steering wheel, and the contact became unconscious temporarily. The contact stated that upon regaining consciousness, the contact noticed that the vehicle had moved to the grass by the left lane of the road, where traffic was going in the opposite direction. It was unknown whether the vehicle was involved in a second collision. A message advising that an accident was detected and inquiring whether 911 should be contacted was displayed. The contact stated that the air bags failed to deploy, and the front driver's side seat belt failed to retract as needed. A bystander opened the driver's side door to verify that the contact was safe. The contact noticed that she was bleeding significantly and was unable to move the right shoulder and the neck. The emergency units assisted the contact out of the vehicle. The emergency units placed braces on the contact's neck and placed the contact on a stretcher. The contact was transported to the hospital, where the contact underwent x-rays and CT scans. The contact was informed that she had sustained a concussion, lumbar injuries, a fractured nose, loss of taste and smell, laceration on the inner and outer side of the bottom lip, carpal tunnel on the right hand, severe whiplash, laceration on the right shoulder, and a cut behind the right ear. The contact was in the process of undergoing mris. A police report was filed. The vehicle was towed and totaled, but was still under investigation. The dealer was not notified of the failure. The manufacturer was notified of the failure, and a case was filed; however, no further assistance was provided. The failure mileage was unknown.

5 Air Bag problem

Failure Date: 05/01/2024

The "service safety restraint system" warning light appears on the dashboard and warning chimes continually sound. To my knowledge GMC had a recall for this in 2018. I purchased the vehicle in 2021. I contacted GMC and told them this issue and they informed me that there are no recalls on the vehicle. My concerns being that airbags are fully functional.

6 Air Bag problem

Failure Date: 12/27/2023

Head on collision with a deer destroying the front head light and severely damaging the drivers side door. No airbags were deployed.

7 Air Bag problem

Failure Date: 03/14/2023

The contact owns a 2018 GMC Terrain. The contact stated that the air bag warning light was illuminated. Additionally, the service restraint system message was displayed on the instrument panel. The vehicle was taken to the dealer to be diagnosed. The contact stated that the driver’s side front impact sensor had failed and needed to be replaced. The vehicle had not been repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 55,705.

8 Air Bag problem

Failure Date: 06/15/2022

The safety restraint system warning keeps coming on and off as well as the air bag light. It happened months ago so I took it in and got it looked at and scanned. All the seatbelts were checked and the scan came back with nothing. Then it stopped for a couple months and now it has started again. Ive had 14 surgeries in the last little less than 4 years and I'm about to go into my 3rd back surgery since November. I cannot get into an accident and not have airbags as I've also had brain surgery 3 winters ago as well. I am disabled and do not have a ton of money either for fixes that aren't necessary but this safety issue is crucial to me. I see that many 2018s have been recalled for the exact same issue that I'm having however mine doesn't come up with that but it is happening to me so that should be included. I also need some direction if not as to why this is happening because I cannot afford to have a dealership, no less, replace every tiny little thing looking for the culprit at $150 an hour when I live on $1,200 a month and most goes to medical. Please advise on what to to or where to start. Thank you.

9 Air Bag problem

Failure Date: 05/08/2022

Started car in parking lot. Warning came on saying “service safety restraint system” and airbag illumination was on. Just notified salesman as I have only had this vehicle about 10 days. Bought it used. Unfortunately.

10 Air Bag problem

Failure Date: 06/22/2020

I was sitting at a red light in the left hand turn lane. A truck ran their red light hitting another truck sending both of them crashing into my vehicle. The first truck struck the front bumper at the headlight & skid all the way down the side of the vehicle then the other truck was slammed into the side of my vehicle. All the damage was on the driver side of the car. My car was moved over into the next lane but no air bags went off. This happened on a hwy where the speed limit is 65. The truck running the red light was going at least that fast and never hit their brakes.

11 Air Bag problem

Failure Date: 01/17/2020

When the side curtain airbag went off it burned a hole through my daughter's coat and shirt causing 2nd-3rd degree burns.

12 Air Bag problem

Failure Date: 01/31/2018

I pulled into our carport. It felt like the car just "sped up and went faster and faster. " it hit the front of the car straight on. No airbags deployed nor did the front end collision stop happen.


Other Air Bag related problems of the 2018 GMC Terrain


Terrain Service Bulletins
Terrain Safety Recalls
Terrain Defect Investigations