37 complaints reported

2018 GMC Terrain Brakes

Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.

Reports
37
Crashes
1
Fires
0
Injuries
1

Complaint Timeline

Chronological view of owner reports

Apr 2022

Vacuum pump went out brakes hard to push and I know gmc had a recall for this issue on other vehicles as well previously.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Mar 2022
Mar 2022

The contact owns a 2018 GMC Terrain. The contact stated that while her husband was driving 50 MPH, the brake pedal was depressed and went to the floorboard. The service brake assist warning light was illuminated. The vehicle was not taken to a dealer nor independent mechanic to be diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 69,000.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Mar 2022
Mar 2022

6/3/22 I went to the grocery store which is on a four lane road. When I left the store I had no brakes. On a four lane stop and go road. The was no warning just nothing peddle to the floor and now check engine light is on. I am reading this same problem repeatedly. I love this car but this is a serious hazard and needs to be addressed. We are all driving around practically rear ending people. I was an inch from the guy in front of me thank God the light changed as I was coming up on him or I would have hit him.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Mar 2022
Jan 2022

While getting off the interstate, the brakes failed with no prior warning, or issues. The brake pedal became extremely difficult to depress and stopping distance was greatly increased. Could not come to a complete stop without using the emergency brake. We drove home (about 2 miles from the interstate exit) and about a half mile after the brake failure, a "service brake assist" light illuminated. Vehicle was towed to dealership the next morning. The problem was the vacuum pump exploded and caused vacuum to the brake booster to be lost, making the pedal difficult to push. Luckily this happened at 11pm and there was nobody in front of us, there definitely would have been a collision.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Jul 2022
Oct 2021

The vehicle experienced a sudden loss of braking and displayed a “brake assist “ fault message. The check engine light has illuminated. The sudden loss of braking was in a residential neighborhood traveling at 35 mph. I was turning during the loss of braking and was able to narrowly avoid collision with the cars at the intersection because I could not slow to a safe speed. The fault codes have not been read by the dealership yet nor has the repair been completed.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Oct 2021
Mar 2021

BRAKING ASSIST MESSAGE IS APPEARING AND BRAKING IS EXTREMELY HARD AT LOW SPEED. YOU HAVE TO PUSH DOWN HARD ON BRAKE TO GET CAR TO STOP.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Mar 2021
Jan 2021 Crash

MY 2018 GMC TERRAIN BRAKES DID NOT WORK WHEN COMING TO A STOP AT STOP LIGHTS WHICH CAUSED ME TO REAR END THE CAR IN FRONT OF ME. THERE WAS NO WARNING ON MY SUV NOR DID I RECEIVE A RECALL ON THIS MATTER. THIS HAPPENED TWICE TO ME IN THIS SAME VEHICLE WHERE THE BRAKES DID NOT RESPOND AT A LOW SPEED CAUSING AN ACCIDENT. THIS ACCIDENT JUST HAPPENED TO CAUSE DAMAGE TO MY VEHICLE AND THE CAR IN FRONT OF ME.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Jan 2021
Sep 2020

THE VACUUM PUMP FAILED FOR THE SECOND TIME IN LESS THAN TWELVE MONTHS. BOTH TIMES THERE WAS NO BRAKES AT ALL WHEN THEY FAILED. BOTH REPAIRS WERE PERFORMED BY GMC DEALERS. FAILURES HAPPENED WHILE THE TERRAIN WAS BEING DRIVEN.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Apr 2020
Jun 2020

MY 2018 TERRAIN HAS 51138 MILES. WHILE DRIVING ON THE INTERSTATE MY BRAKE SYSTEM LOCKED AND I WAS UNABLE TO STOP. I HAD TO COAST TO A SAFE SPEED AND PULL MY PARK BRAKE TO COME TO A STOP. BECAUSE MY BUMPER TO BUMPER WARRANTY IS OUT THE DEALERSHIP IS CHARGING ME. THE VACUUM PUMP IS OUT. EVEN THE TECHNICIAN ACKNOWLEDGED THE PART WAS DEFECTIVE AND ACKNOWLEDGED IT HAPPENED REALLY EARLY ON IN MY VEHICLES MILEAGE BUT IS STILL SAYING IT IS MY COST TO REPLACE. I ASKED REPEATEDLY FOR THE PART NUMBER SO I COULD COMPARE THAT PART NUMBER TO THE PART THAT WAS RECALLED ON THE 2018 GMC TRUCKS AND THE DEALERSHIP AND GM REFUSED TO GIVE ME THE PART NUMBER. *TR

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Dec 2020
Feb 2020

I PURCHASED A BRAND NEW 2018 GMC TERRAIN (VIN NO. [XXX]) TWO YEARS AGO. THE VEHICLE HAS APPROXIMATELY 50,000 MILES ON IT. ON AUGUST 6, 2020, MY HUSBAND AND I WERE TRAVELING WITH OUR 2-YEAR-OLD SON TO ATTEND AN OUT-OF-STATE FUNERAL. TRAVELING AROUND 75 MPH ON THE HIGHWAY, THE BRAKES FAILED US. THE PEDAL BECAME ENTIRELY STIFF MAKING IT NEARLY IMPOSSIBLE TO SLOW DOWN AND STOP. IT TOOK CONSIDERABLE FORCE TO BRING THE VEHICLE TO A STOP. REMIND YOU, I WAS TRAVELING WITH MY 2-YEAR-OLD SON. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Jun 2020
May 2019

BOUGHT BRAND NEW. AT 14,000 MILES ALL 4 ROTORS ARE PITTED WITH GROOVES. DEALER TOOK THEM APART AND FOUND NOTHING THAT COULD CAUSE IT. SAID THEY WERE "WEATHERED". TOOK IT TO 2 OTHER PLACES AND SAID IT WAS A MANUFACTURE DEFECT. DEALER WONT REPLACE BECAUSE BUMPER TO BUMPER WONT COVER IT. ITS A DEFECT DIDNT NOTICE UNTIL ANOTHER DEALER DID THE OIL CHANGE. THE DEALER IN FEBRUARY SAID THEY WERENT LIKE THAT IN FEBRUARY.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Jan 2019
Oct 2018

TAKATA RECALL MY COMPLAINT DOES NOT STEM FROM THE DEALERSHIP FIXING THE ISSUE, AS I HAVE NOT BROUGHT THE TRUCK IN YET FOR THE FIX. MY ISSUES LIES IN THE FACT THAT I HAVE TWO YOUNG CHILDREN AGES 3 AND 5 YEARS OLD. I AM NOW STUCK IN A LEASE FOR 3 YEARS KNOWING THE BRAKING SYSTEM IS UNSTABLE. THAT CAUSES ALARMING CONCERN TO ME AND MY WIFE. I DO NOT WANT TO DRIVE THIS CAR WITH MY CHILDREN IN IT AND NOW I HAVE NO CHOICE BUT TO SO FOR THE REMAINDER OF THE LEASE WHICH IS ALMOST 3 YEARS AS I JUST LEASED THE VEHICLE IN JULY. THERE IS NO GUARANTEE THAT THIS CAN'T HAPPEN AGAIN AND I THEREFORE ASK TO BE ABLE TO LEASE ANOTHER VEHICLE AT THE PRICE I AM CURRENTLY PAYING PER MONTH. THE SAFETY OF MY FAMILY IS FIRST AND FOREMOST. UNLESS I RECEIVE A GUARANTEE FROM THE MANUFACTURER THAT THIS WILL NOT HAPPEN AGAIN WITH MY VEHICLE I AM LEFT WITH MORE CONCERNS THAT ONE WHO LEASES A NEW VEHICLE SHOULD BE LEFT WITH.

Type: Vehicle, Vehicle: 2018 GMC TERRAIN, Manufacturer: General Motors, LLC
Incident: Oct 2018

Trend Over Time

Complaints by year

Quick Summary

The 2018 GMC Terrain has 37 Brakes complaints on file. 1 crashes have been reported. Review the timeline above for detailed owner experiences.