pretty bad
Typical Repair Cost:
No data
Average Mileage:
13,550 miles
Total Complaints:
2 complaints

Most Common Solutions:

  1. not sure (2 reports)
2015 GMC Terrain transmission problems

transmission problem

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2015 GMC Terrain Owner Comments

problem #2

Mar 282016

Terrain SLE-1 2.4L 4 cyl

  • Automatic transmission
  • 17,349 miles


hard downshifting coming to stops

The "thumping" of the transmission coming to stops got worse. Took her to the dealership again. The dealership was very diligent in working to resolve this. They had the Terrain for 2 days, did some tear-down, couldn't find any visual issues, so then drove 3 Terrains of the same year and powertrain. They involved their transmission guy, service tech and foreman. They all reported that all of these Terrains have this problem! I elevated this to GMC customer service, they looked into it for 2 days, and called me back. The answer I received floored me - I was told that there was nothing I could be offered for a resolution since this seems to be "characteristic of the vehicle" and the "vehicle is performing as designed." Amazing... So a poor design is something customers apparently just have to live with. If the Terrain had done this when we test drove it, we would not have purchased it. It's a real shame, because it's a great vehicle with a lot of great features. But, when design engineers squeeze a few bucks tossing the same transmission in this SUV that is in the Chevy Cruze, this is what happens. I would advise readers to go with the 3.6L with the heavy transmission (6T75), but I have 2 friends who have experienced far worse problems with this powertrain in an Acadia and Traverse. I guess GMC's quality focus is simply not there even after all these lawsuits and recalls.

- Rodney S., Canton, OH, US

problem #1

Nov 132015

Terrain SLE-1 2.4L 4 cyl

  • Automatic transmission
  • 9,657 miles

hard downshifting

We love our terrain and feel it's a great vehicle, but shortly after purchasing it, we started noticing that as we came to stops that there was a "slip"/thump. At first we thought our brake pads weren't mating properly to the rotors, then we quickly noticed the "thumps" were getting worse and that it was a harsh transmission downshift coming to stops. We took our Terrain to our dealership, and they said they could not duplicate and that it may be part of the "adaptive learning" feature of the vehicle and to give it more time... We did and now with 17k miles, the problem is becoming more pronounced!

- Rodney S., Canton, OH, US

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