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What 370 owners told NHTSA about the 2012 GMC Terrain

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (370)Crash / fire / injury (26)Engine (170)Visibility & wipers (81)Transmission & drivetrain (37)Electrical system (33)Fuel system (30)Airbags (27)Body & structure (14)Electronic Stability Control (esc) (13)Speed control (11)Lights (10)

5 of 370 complaints match · Engine · crash/fire/injury only · clear filters

Nov 3, 2022Transmission & drivetrainSpeed controlEngineFire

First off before I got the car it had gone through a tune up. About a couple months after I got the car little things started to happen it would rock back and forth while idling I thought it was kind of an indicator that it needed oil but the percentage was still at a decent range and telling me it didn't need oil plus I hadent driven it 3000-5000 miles. Then engine light came on had it inspected codes ran came back telling me something about Throttle body So I purchased a whole new throttle body in Prosser at dealership costing me some booko buks and swapped it out when I got back home I then took it for test drive along with my 4 kids in the vehicle with me and then a little ways about 20 mins driving engine power reduced light came on along with stabilitrak and eventually lost power I was stranded in the middle of summer in the middle of nowhere with my kids windows rolled down ppl drove by and asked if I needed help and eventually came back with jumper cables tried to jump me but the car wouldn't budge I then left the car there overnight and took battery out to have it inspected the next day IT WAS FRIED (over 4 yrs old) so I had to purchase a new one costing me roughly 150 buks then took it back to where my car was stranded put it in and alarm went off and I clicked the button on key ring stuck it in ignition shit the door behind me locking keys in car while vehicle was still running and had to bust a window out to get to em. Got into car drove off made it back to my apt left it running outside while I went inside to get some stuff before I THOUGHT the problem was solved it shut off again.....I then had to replace the alternator costing me another pretty penny....about a couple weeks later I was starting a new job at a assisted living facility and arrived 10 mins early shit car off a noticed smoke coming from under hood I was confused because where the smoke was coming from couldn't have been it overheating I popped the hood and my car was on fire!!!!

NHTSA ODI 11492036

Oct 22, 2018Engine1 injury

JANURARY 7TH 2018 MY 2012 GMC TERRAIN RAN OUT OF OIL EVEN THOUGH IT WAS ALREADY FIXED 6 MONTHS PRIOR FOR SPECIAL ADJUSTMENT COVERAGE 16118 WHICH HAD PISTONS, PISTON RINGS, TIMING CHAIN ETC. FIXED TO REPAIR THE OIL CONSUMPTION ISSUE (SEE ADJUSTMENTS 14882 AND 16118. COVERAGE 14882 IS A RESULT OF FAILURE TO CORRECTLY FIX THE 16118 AND IS A DIRECT RESULT OF 14882 AND GMC STATES THEY WILL COVER ME IF THIS HAPPENS. GMC CUSTOMER SERVICE SAYS MY VIN # IS NOT COVERED UNDER THIS COVERAGE. IF ITS THE SAME EXACT ISSUE FOR (MODEL/ENGINE) WHY WOULD VIN # MATTER? ON TOP OF THAT I TOOK MY VEHICLE TO ANOTHER DEALER (DEALERSHIP B) AS I BROUGHT MY VEHICLE TO LETS CALL IT DEALERSHIP A SO MANY TIMES BEFORE WITH THE SAME ISSUE. DEALERSHIP B FILLED IT WITH OIL AND SENT ME ON MY WAY. I TOLD THEM TO MAKE SURE THE ISSUE WAS FIXED. THEY SAID THEY TEST DROVE IT AND EVERYTHING IS FINE AND THEY DIDNT DO ANYTHING BUT PUT OIL IN IT AND TEST. ON THE WAY HOME JAN. 7TH THE SAME DAY THE CAR STARTING DYING ON ME, STALLING AND MAKING POPPING NOISES AND JERKING WILDLY WHICH IS WHY I BROUGHT IT IN THE FIRST PLACE. DEALERSHIP B KNOWING DEALERSHIP A "FIXED" THIS ISSUE 6 MONTHS BEFORE SO THEY SAID THEY WOULD NOT FIX IT EVEN THOUGH THEY KNOW FOR SURE THIS ISSUE WAS CAUSED BY COVERAGE 14882. I TOLD DEALERSHIP A THIS AND THEY SAID THEY ARE ONLY GOING WITH WHAT GMC SAYS WHICH IS THAT MY VIN # IS NOT COVERED BUT THEY WERE WILLING TO SPLIT THE COST WITH ME (ROUGHLY $850, ADMITTING PARTIAL FAULT, LOL) I SAID NO AND THEN PLEADED WITH THEM THAT I SHOULDNT PAY ANYTHING CAUSE IM COVERED. THEY ENDED THE CONVERSATION WITH THE VEHICLE IS NOT COVERED BECAUSE COVERAGE 16882 IS NOT RELATED IN ANY WAY TO 14882 BUT EVEN GMC AND DEALERSHIP B SAYS THEY ARE DIRECTLY RELATED. WHO IS LYING HERE? I PAY $450 A MONTH FOR A GIANT SUV THAT SITS IN MY GARAGE. GMC IS KNOWINGLY BREAKING THE LAW, HOW CAN THEY DO THIS TO SO MANY PEOPLE?

NHTSA ODI 11141850

Nov 5, 2017Electrical systemEngineFire

VEHICLE CHECK ENGINE LIGHT CAME ON AT 50,000 MILES, WOULD NOT PASS INSPECTION. COMPUTER DID NOT SHOW WHAT PROBLEM WAS. CAR WOULD CUT OFF IN DRIVE IN IDLE. CAR WOULD SHAKE. MECHANICS PUT IN NEW PARTS AND BATTERY FOR MORE THAN $1200. STILL WAS NOT FIXED. MECHANIC WENT TO A DEALERSHIP TO INQUIRE IF THEY HAD SEEN THIS PROBLEM. AT THE DEALERSHIP IT WAS DISCOVERED THAT MANY OF THE PARTS THAT WOULD CAUSE THE PROBLEM WERE ON RECALL. GM HAD NOT POSTED THESE RECALLS OR NOTIFIED ME, THE OWNER. AFTER INSPECTING THE CAR THEY SAID THERE WAS TOO MUCH WRONG TO REPAIR AND THE ENTIRE ENGINE WOULD NEED TO BE REPLACED. THEY SAID I WOULD NEED TO DRIVE 2000 MILES TO CHECK OIL CONSUMPTION. THEY NEVER MADE US AWARE THERE MAY BE PROBLEM WITH THE OIL CONSUMPTION. I AM 68 YRS OLD AND WALK WITH A WALKER. I AM IN THE HOSPITAL OFTEN. THE MECHANICS SAID THEY WOULD DRIVE THE CAR AS MUCH AS THEY THOUGHT NECESSARY TO DETERMINE OIL CONSUMPTION. WHILE DRIVING THE VEHICLE IN CHARLOTTE NC THE CAR STARTED SMOKING AND CAUGHT FIRE. THE DRIVER FORCED HIS WAY OUT BUT HAD THAT BEEN ME, I PROBABLY WOULD HAVE DIED DUE TO MY HANDICAP. I HAVE NOW BEEN WITHOUT A VEHICLE FOR OVER A MONTH. I HAVE CONTACTED GM BUT THEY ARE SLOW FOR ANY RESOLUTION. I ASKED FOR A LOANER VEHICLE BUT WAS TOLD THEY COULDN'T DO THAT NOW.

NHTSA ODI 11043478

Mar 8, 2016EngineFire

I WAS TRAVELING ON THE TOLL WAY AND WENT TO PASS A VEHICLE GOING BELOW THE SPEED LIMIT. UPON ACCELERATION (APPROX 53 MPH), I HEARD A MUFFLED POP IN THE ENGINE COMPARTMENT AND WHITE SMOKE TRAILED THE VEHICLE. NO WARNING LIGHTS WENT OFF PRIOR AND I DO NOT RECALL SEEING ANY AFTER THE "POP". I STOPPED THE VEHICLE AND TURNED OFF THE ENGINE, OPENED THE HOOD TO FIND FLAMES UNDER THE ENGINE IN VICINITY OF THE OIL PAN. I WAS UNABLE TO PUT OUT THE FLAMES AND THE FIRE CONSUMED THE VEHICLE. I VEHICLE WAS WELL MAINTAINED AND HAVE NO IDEA WHAT THE ORIGIN OF THE FIRE WAS.

NHTSA ODI 10840445

Jul 18, 2012SuspensionAirbagsBody & structureEngineCrash1 injury

?ON APRIL 16TH OUR SON WAS DRIVING ON FAIRVIEW RD. AND TRAVELING THROUGH A GREEN LIGHT WHEN A CAR THAT RAN A RED LIGHT HIT HIM. ?HIS CAR ? A GMC 2012 TERRAIN WAS HIT MULTIPLE TIMES ? DRIVER'S FRONT END, FRONT END AND SPUN AROUND FROM THE FORCE AND HIT ON THE PASSENGER SIDE. NO AIRBAGS DEPLOYED ?[XXX] WAS IMMEDIATELY CONTACTED BY ON STAR, THEY CALLED POLICE, HIS CAR WAS TOTALED ?ON 4/21 I EMAILED GMC AND ASKED WHAT DEPARTMENT I WOULD CONTACT TO FILE A COMPLAINT ABOUT THE FRONT AND SIDE AIRBAGS NOT DEPLOYING CALL FROM GMC 866-790-5700 EXT. 22745 SAID ON VOICE MAIL ? THE AIRBAG DID NOT DEPLOY AS IT SHOULD HAVE? HE MADE A CASE NUMBER [XXX] GMC HAS SINCE DECLARED THIS WAS A LOW THRESHOLD EVENT - NO NEED FOR AIRBAG DEPLOYMENT - YET THE CAR WAS TOTALED AND OUR SON HAS WHIPLASH AND CONTUSIONS INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

NHTSA ODI 10466384

Working with the data? Download all 370 complaints as CSV · fetched from NHTSA July 10, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2012 GMC Terrain verdict →