2015 GMC Terrain Body & structure Problems

2015 gmc terrain sle awd. Suv was taking in for oil change found excessive rust on frame under all four doors. On both sides rust and holes near the front of both rear wheels. I believe its called the "rocker" I'm unsure. I bought the car at a little over 71,000 miles in 2022-2023 now just getting to 94,000 in February 2026. If there was rust which there probably was the car should have not been sold if the rust was enough to cause problem later on. I may need to go purchase a new car while still owe some money in the car loan. Rust and hole in the rear control arm. The amount to replace and repair all the parts with labor exceeds current value.

NHTSA ID

11721580

Incident

Feb 28, 2026

First occurrence in September 2015. Rear lift gate acted abnormally, when I was parked,y son opened the lift gate using the normal door handle button, it raised, but as he was loading it lowered onto him. He is small, I had to get out and pull it off of him, it went up and down a couple times and then closed. You cannot stop it from closing down on you if you are trying to load or unload into that compartment. We have had to stop using altogether.

NHTSA ID

11708494

Incident

Sep 4, 2025

The contact owns a 2015 GMC Terrain. The contact stated that moisture was leaking into the vehicle from an unknown location. The contact stated that the leak first started on the front driver’s side of the vehicle. The contact took the vehicle to an independent mechanic where the mechanic was unable to identify the source of the leak. While attempting to prevent mold from forming inside the vehicle, the front interior carpeting of the vehicle was detailed and vacuumed. The contact stated that recently the leak returned on the passenger’s side of the vehicle. Neither the dealer nor the manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was unknown.

NHTSA ID

11526547

Incident

Apr 1, 2022

The contact had a dealer loaner vehicle, a 2015 GMC Terrain. The contact stated the liftgate raised up extremely fast and caused the hydraulic on the passenger side to detach. Once the hydraulic fell, the liftgate hit her in the head, and she became unconscious. A random person assisted contact. Once she became conscious she drove herself to an emergency. The contact was diagnosed with major injuries of spinal whiplash and consciousness. The contact had been scheduled for a neurologist. The dealer was notified of the failure; however, were not of assistance. The dealer informed the contact to notify GMC of the failure. The manufacturer has not been notified. The approximate failure mileage was 102,000

NHTSA ID

11463333

Incident

Apr 10, 2022

Mileage

102,000 mi

WHILE PULLING INTO A PARKING SPOT VERY SLOW THE VEHICLE ACCELERATED AND DAMAGED CAR IN FRONT THERE ARE TRACTION MARKS SHOWING THE SUDDEN ACCELERATION. THE CAR WOULD NOT STOP UNTIL THE IGNITION WAS TURNED OFF. BECAUSE THE CARS IN FRONT WERE HIT I PLACED THE CAR IN PARK AFTER THE IGNITION WAS TURNED OFF.

NHTSA ID

11289738

Incident

Dec 16, 2019

Mileage

60,000 mi

THERE IS WATER LEAKING (POSSIBLY FROM THE AIR CONDITIONER) ONTO THE FLOORBOARD OF THE FRONT PASSENGER SIDE. THIS HAS CAUSED MOLD TO FORM AND GROW IN THE CARPETING. IT IS CONSTANT AND IS GETTING WORSE.

NHTSA ID

11287447

Incident

Sep 1, 2019

Mileage

40,000 mi

THE REAR HATCH WILL FULLY OPEN AND THEN FALLS PART WAY OR FULLY WITHOUT ANY CAUSE. IT HIT ME IN THE HEAD AND BACK AS I WAS NOT EXPECTING THE HATCH DOOR TO FALL. THIS WAS OBVIOUSLY WHILE THE CAR WAS PARKED IN A GARAGE.

NHTSA ID

11265496

Incident

Oct 1, 2019

Mileage

54,410 mi

TL* THE CONTACT OWNS A 2015 GMC TERRAIN. THE CONTACT STATED THAT THE LIFTGATE LIFTED AND LOWERED ON ITS OWN. THE LIFTGATE STRUCK THE CONTACT'S SPOUSE AND THEN LIFTED AGAIN. THE CONTACT'S SPOUSE HAD TO HOLD THE LIFTGATE BEFORE IT STRUCK THEIR DAUGHTER. THE LIFTGATE EVENTUALLY CLOSED ON ITS OWN. THERE WERE NO INJURIES. THE CONTACT MADE AN APPOINTMENT NEXT WEEK WITH JOHNSON MOTORS (1891 BLINKER PKWY, DUBOIS, PA 15801, (877) 816-0659) TO HAVE THE VEHICLE DIAGNOSED AND REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 48,000. *DT

NHTSA ID

11203952

Incident

Apr 25, 2019

Mileage

48,000 mi

WHILE PARKED IN MY DRIVEWAY. THE AUTOMATIC LIFTGATE GOES UP AND THEN FALLS HALFWAY, GOES UP AN THEN FALLS BACK ALL THE WAY DOWN. IT HIT ME AN KNOCKED ME OWN THE FIRST TIME. IT STARTED IN JULY OF THIS YEAR AND DOES IT CONSISTENTLY. I COULD HAVE BEEN SERIOUSLY HURT OR A CHILD COULD EVEN BE CRUSHED AS IT IS EXTREMELY HEAVY. I CANNOT USE THE REAR COMPARTMENT AS THE LIFTGATE WILL NOT STAY OPEN. THERE IS A LAWSUIT ON CERTAIN YEARS FOR THIS VERY PROBLEM AND GMC HAS A TSB UP THROUGH 2014 BUT FOR SOME REASON THE 2015 MODEL IS NOT INCLUDE EVEN THOUGH IT HAS THE EXACT SAME ISSUE. HERE IS A VIDEO OF THE ISSUE. THIS IS ANOTHER TERRAIN AS I DON'T KNOW HOW TO GET A VIDEO OF MINE ON YOUTUBE. HTTPS://WWW.YOUTUBE.COM/WATCH?V=U3NCKL-DETA

NHTSA ID

11129629

Incident

Jul 4, 2018

Mileage

60,400 mi

TL* THE CONTACT OWNS A 2015 GMC TERRAIN. THE CONTACT STATED THAT WHEN THE AUTOMATIC LIFTGATE BUTTON ON THE KEY FOB WAS DEPRESSED, THE LIFTGATE OPENED AND CAME DOWN SUDDENLY WITHOUT WARNING. THE CONTACT WAS STRUCK ON THE HEAD, BUT WAS UNINJURED. THE CONTACT STATED THAT THE FAILURE OCCURRED FIVE OTHER TIMES. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND COMPLAINT NUMBER: 8-292626883080 WAS FILED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 50,000.

NHTSA ID

10982999

Incident

Apr 2, 2017

Mileage

50,000 mi

FRONT PASSENGER SEAT BELT CHIME COMES ON WHEN THERE IS NOTHING ON THE FRONT SEAT OR ALMOST NOTHING ON THE SEAT. THIS HAS HAPPENED AT LEAST 1/2 DOZEN TIMES OR MORE. I CAN BE DRIVING AND ALL OF SUDDEN COMES ON. IT CAN SCARE ONE ESP 1ST TIME. YOU DON'T KNOW WHAT IS HAPPENING. I THOUGHT I BLEW A TIRE OR DOOR CAME OPEN. MY ATTENTION WAS EVERYWHERE BUT ON 65 MPH TRAFFIC ON FREEWAY. BREAKS ONE'S DRIVING CONCENTRATION. INDEPENDENT OF TEMPERATURE. OTHER PROBLEM I HAVE IS LOTS OF WIND COMES IN ON PASSENGER DOOR. IT IS NOT ALIGNED PROPERLY. GM HAS TRIED A COUPLE OF TIMES WITH NO SUCCESS. VERY ANNOYING AND HARD TO HEAR RADIO ETC.. 3RD PROBLEM IS NAVIGATION,COMMUNICATION CENTER,IT KEEPS DISAPPEARING. IT IS GIVING ME DIRECTIONS SOMEWHERE AND THEN JUST DISAPPEARS AND RESETS. IT HAS BEEN REPLACED ONCE. IT HAS GOTTEN ME STRANDED MORE THAN ONCE. I AM A SENIOR WHO RELIES ON SYSTEM. WHEN IT DISAPPEARS, I AM NOT ALWAYS SOMEWHERE THAT I CAN STOP TO COMPLETELY RESET AND REENTER ALL THE INFORMATION AGAIN. I FEEL THAT THIS IS A SAFETY ISSUE. I WAS ON HWY EVERY TIME AND MOST OF THE TIME NOT IN A REMOTE AREA BUT NOT IN AREA THAT I COULD STOP. IN CA. THERE ARE MANY AREAS YOU DO NOT WANT TO GET OFF THE FRWY AT. ALL INSTANCES ABOVE HAPPENED IN THE CITY AREAS WHILE DRIVING. SERVICE WAS DONE OCT 2015. NONE OF ISSUES RESOLVED DESPITE ATTEMPT. ALL ARE ONGOING.

NHTSA ID

10840112

Incident

Oct 8, 2015

Mileage

6,810 mi

IN THE EARLY MORNING OF 9-5-15 MY DAUGHTER BEGAN DRIVING HOME FROM PITTSBURGH TO DE. SHE SWERVED TO AVOID AN ANIMAL ON THE PA TURNPIKE, HIT THE JERSEY WALL ON THE RIGHT, ROLLED OVER COMPLETELY TWICE TO THE LEFT, LANDING UPRIGHT IN THE MEDIAN. LUCKILY THE SEAT BELT SAVED HER AND SHE HAD ONLY MINOR INJURIES. HOWEVER THE SIDE AIR BAGS DID NOT DEPLOY. IN FACT ONSTAR CALLED 911 BECAUSE THEIR MONITORING EQUIPMENT SHOWED THAT THE AIR BAGS HAD DEPLOYED, BUT THEY DID NOT. THE VEHICLE WAS DECLARED A TOTAL LOSS. THERE IS NO RECALL ON THIS VEHICLE FOR AIRBAG PROBLEM THOUGH I'VE HEARD THAT THERE SHOULD BE SO I WANTED TO REPORT THIS.

NHTSA ID

10767506

Incident

Sep 5, 2015

Mileage

10,000 mi