Used 2018 GMC Terrain Diesel Consumer Reviews
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Diesel engine (Iszusu) is crap
JHS, 07/24/2018
2018 GMC Terrain SLT 4dr SUV (1.6L 4cyl Turbodiesel 6A)
22 of 43 people found this review helpful
This diesel engine is crap. Beware. You might be traveling on the Interstate at 70mph when all of a sudden, with no reason or warning, this GMC will throttle you down to 45mph. So, get ready to use your hazards as you rush to the slow lane and hope your GMC Terrain TurboDiesel makes it to the next exit. Good thing this is a company car and I can get my company to NEVER DO BUSINESS WITH GM AGAIN. Do not buy this car as the diesel engine is crap and the Dealers have no idea how to deal with it or the weird messages, combined with the check engine light, that show up ion the dash, seemingly translated from Czech.
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Terrain Rocks
JH, 07/11/2018
2018 GMC Terrain SLE 4dr SUV AWD (1.6L 4cyl Turbodiesel 6A)
9 of 18 people found this review helpful
I would buy it again in a heartbeat
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2018 GMC Terrain for sale near you
3 of 32 listings
- SLT 4dr SUVMSRP: $18,00013 mi away
- SLT 4dr SUVMSRP: $14,387In-stock online
- SLE 4dr SUVMSRP: $9,99924 mi away
See all 32 listings
Not very dependable
Travis Needham, 05/22/2021
updated 08/16/2024
2018 GMC Terrain SLT 4dr SUV (1.6L 4cyl Turbodiesel 6A)
2 of 3 people found this review helpful
Numerous exhaust / DEF issues. Just put in the 3rd transmission. Turbo went out when shop test drove it after Trans was replaced. Parts are almost impossible to acquire. When it runs it is awesome. Currently at 42 days in the shop for this issue. It has left me stranded 3 times in 1 year. DEF sensors get replaced every 9 months. The last one GM warranted the part but no labor. Averages 36 mpg. It’s a great car when it runs. Still not very dependable. Current transmission has been in 1 year. It does slip sometimes but GM states nothing wrong. I’m pretty sure it will go out again before warranty is up. UPDATE: The diesel engine is the least reliable power plant offered. Transmission and turbo failures plague the diesel drivetrain. Lots of emissions issues as well. Buy the gasser and not the diesel.
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Love my Terrain!
R. Riggins, 12/30/2022
2018 GMC Terrain SLT 4dr SUV (1.6L 4cyl Turbodiesel 6A)
1 of 1 people found this review helpful
Love the way it handles in the Ohio snow. The diesel engine is awesome.
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