2020 GMC TERRAIN Complaints

View complaints related to 2020 GMC TERRAIN. The complaints found here are submitted by actual consumers with first hand experience. There are more than 190 complaints submitted for the 2020 GMC TERRAIN. You can submit your own complaint to the NHTSA or call the Hotline, Monday-Friday 8am to 8pm at (888) 327-4236, TTY: (800) 424-9153.

  • 2020 GMC TERRAIN
    - AURORA, CO

    WHEN REVERSING OUT OF A PARKING SPOT, BRAKES FAILED CAUSING ACCIDENT. MULTIPLE ATTEMPTS TO DEPRESS BRAKE PEDAL WITH NO BRAKING. HIT A PARKED CAR. AFTER SHUTTING CAR OFF AND ATTEMPTING TO MOVE VEHICLE BRAKES DID ENGAGE AND RESPOND CORRECTLY. REAR DAMAGE TO TERRAIN OCCURRED REQUIRING TOWING.

    Source: NHTSA WEB SITE
  • 2020 GMC TERRAIN
    - NORTH HOLLYWOOD, CA

    WE DROVE TO A FARM WITH A FAMILY OF 5M KIDS AND AN ELDERLY, AND PARKED MY CAR FOR 2-3 HOURS IN THE FARM'S OPEN AREA PARKING LOT. VEHICLE SHOWED NO WARNING LIGHTS, NO PROBLEMS, NO ISSUES DURING OUR DRIVE TO THE FARM AND PRIOR TO THIS TRIP. EVERYTHING WAS FINE WHEN WE GO THERE AND PARKED. WE WERE READY TO LEAVE THE FARM TO DRIVE BACK HOME, BUT THE CAR SIMPLY WOULDN'T START.THE NEUTRAL GEAR DIDN'T WORK, I ATTEMPTED MANY TIMES IN 30 MINUTES TO START THE CAR, BUT IT DIDN'T START, CONTINUED MAKING THE SOUND OF ENGINE ATTEMPTING TO START BUT NOT SUCEEDING. 30 MINUTES LATER, I DECIDED TO GIVE IT ANOTHER TRY, I WAS AFRAID TO BURN DOWN THE STARTER AFTER ATTEMPTING SO MANY TIMES. IT SOUNDED TERRIBLE, SCREECHING METAL SOUND. ALL OF A SUDDEN, THE CAR STARTED. I LET IT RUN, AFRAID TO TURN IT OFF AGAIN. AFTER 15 MINUTES OF RUNNING, WHILE WE WERE WAITING FOR ROADSIDE ASSISTANCE TO ARRIVE, THE VEHICLE TURNED OFF AGAIN, ALL BY ITSELF. NO ONE WAS INSIDE THE CAR, WE WERE WAITING OUTSIDE WITH THE DRIVER DOOR WIDE OPEN. I CALLED ROADSIDE ASSISTANCE, WAITED 40 MINUTES TO GET A LIVE AGENT TO TALK TO. THE YELLOW ENGINE LIGHT IS ON. I TRIED TO LOOK IN THE MANUAL TO BE ABLE TO FIND ANYTHING REMOTELY CLOSE TO WHAT WAS HAPPENING. CAME UP WITH NOTHING. THIS WAS SO FAR THE TRICKIEST THING TO HAPPEN TO ME. I SCHEDULED AN APPOINTMENT TO TAKE THE CAR TO THE DEALERSHIP FOR DIAGNOSIS.

    Source: NHTSA WEB SITE
  • 2020 GMC TERRAIN
    - UMION, NJ

    THE AC SYSTEM PRODUCES A TOXIC CHEMICAL SMELL CAUSING THE DRIVER AND/OR PASSENGER TO OPEN THE WINDOWS IN ORDER TO REMOVE THE TOXIC ODOR. THE SMELL IS INTERMITTENT AND CAN BE MODERATE TO EXTREMELY POTENT.THE VEHICLE IS USUALLY IN MOTION WHEN THIS OCCURS AND CAN HAPPEN WHILE DRIVING LOCALLY AND ON THE HIGHWAY. THE LAST TIME THIS HAPPENED WAS AUG. 1, 2020. I HAVE HAD THE VEHICLE SEEN AT A LOCAL GMC DEALER 3 TIME SINCE JUNE, 2020. THE VEHICLE WAS NOT DRIVEN BETWEEN MARCH AND EARLY JUNE DUE TO THE PANDEMIC.

    Source: NHTSA WEB SITE
  • 2020 GMC TERRAIN
    - ROCHESTER, MN

    EVERY WEEK IT'S SOMETHING DIFFERENT. IN MOTION... NO CRUZE CONTROL. NO AUDIO. DON'T DRIVE OVER 50MPH BRAKE PROBLEM. PARKING BRAKE ENGAGES RANDOMLY AND WITHOUT USER ENGAGEMENT. NO AWD. NO STABILITY TRACTION. THIS HAPPENS SO FREQUENTLY THE DASH INDICATORS HAVE BEEN REDUCED TO 'IDIOT LIGHTS'. AT WHAT POINT DO I BECOME CONCERNED? THINGS APPEAR TO RESOLVE WHEN THE ENGINE IS TURNED OFF AND BACK ON, SOMETIMES....I COMPARE IT TO OTHER GLITCHY TECHNOLOGY. HOWEVER I POTENTIALLY COULD BE AT AN 80MPH CRAZING SPEED WHEN I DECIDE TO IGNORE THE IDIOT LIGHTS...WHAT HAPPENS WHEN A REAL PROBLEM PRESENTS AND I IGNORE THE DASH INDICATORS DO TO FREQUENT GLITCHES? I'M SO DISAPPOINTED. MY 2 PREVIOUS TERRAINS WERE 10 TIMES THE VEHICLE THE 2020 MODEL YEAR.

    Source: NHTSA WEB SITE
  • 2020 GMC TERRAIN
    - KYLE, TX

    THE COMPLAINT I HAVE IS THE INSIDE FRONT OF THE CAR IS TOO SMALL AND I CANT REACH THE GAS PEDAL EXCEPT WITH MY TOE. MY FOOT KEEPS SLIPPING OFF AS I AM DRIVING. I HAVE TO HAVE THE SEAT WAY UP OR I CANT REACH. I AM 5 FOOT TALL WOMAN. THIS IS A RIDICULOUS THING THAT I HAVE TO PUT UP. I DROVE IT FOR 10 MINUTES AND DIDN'T REALIZE IT. I ASKED FOR A PEDAL THAT IS LONGER AND CLOSER TO THE FLOOR AFTER I HAD BOUGHT IT AND SERVICE PEOPLE TOLD ME THEY DON'T HAVE ANYTHING TO DO TO FIX IT. THEY ASKED IF I HAD A BUTTON TO ADJUST IT AND I DON'T. ITS ON THE EXPENSIVE ONE. THIS SHOULD BE ON ALL VEHICLES FOR SAFETY. I WANTED TO GIVE IT BACK BUT THEY NEVER HELPED ME. I HAVE 1100 MILES ON IT .IT NEW STILL. THE OTHER THING THIS CREATES IS I AM UP SO CLOSE TO THE STEERING WHEEL THAT ITS ALMOST ON MY CHEST IN ORDER TO REACH PEDAL WITHOUT HAVING TO STRAIN AND LATER HAVING PAIN IN MY LEG FROM DOING THAT. I AM SO DISAPPOINTED WITH CHUCK NASH GMC IN SAN MARCOS , TEXAS. IS THERE ANYTHING TO BE DONE BY THE GMC COMPANY. I ALSO TOLD THE SALESMAN I WANTED A CANYON PICKUP LIKE I HAD BEFORE. I TRADED THAT ONE IN DUE TO THE FACT THAT THE 2017 CANYON WAS ALWAYS IN THE SHOP. ONLY HAD IT FOR 2 YRS AND 1 MONTH. THEY WERE NO HELP! THANK YOU, [XXX] PLEASE HELP ME INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

    Source: NHTSA WEB SITE
  • 2020 GMC TERRAIN
    - EVANSTON, IL

    WHEN CRUISE CONTROL IS ENGAGED AT 71MPH, HOLDING +RES BUTTON TO INCREASE SPEED AND RELEASING IT AT 77MPH SETS CRUISE SPEED TOO HIGH. CAR CONTINUES TO ACCELERATE. CRUISE GETS SET AT 100MPH AND ACCELERATES MORE THEN DESIRED. SEE LINK WITH VIDEO OF EVENT HTTPS://PHOTOS.APP.GOO.GL/O7ZGEQWCSU7KYCV58 SEE ATTACHED PICTURE OF OWNERS MANUAL

    Source: NHTSA WEB SITE