Table 1 shows twelve common engine and engine cooling related problems of the 2015 GMC Terrain. The number one most common problem is related to the engine and engine cooling (58 problems). The second most common problem is related to the crankcase (pcv) (five problems).
I own a 2015 GMC Terrain, 4d. Vehicle started displaying error p0016 during the evening of 07/27/2025, the following day the vehicle stopped working. I towed the vehicle to three different mechanics. All three mechanics indicated that the engine needs to be replaced. Read details...
Catastrophic mechanical failure; engine failure. Below freezing day driving normally until the car just died right in the middle of a busy 4 lane road. No warning lights were displayed. Luckily I was able to drift the car over to the curb lane then manually push into a parking lot with cars driving Read details...
I noticed my oil l was leaking severely. I had to add oil between changes even. Ended up having both seals replaced less the 2 months ago. It is still leaking. I have to have my oil changed every 2 weeks and add 2-5 quarts between changes. Just put my 2015 Terrain back in the shop at the dealership. Read details...