2019 GMC Terrain Electrical System Problems

Back up camera just started showing a blue screen with message that stated service back up camera. No accident, has not been to dealership. Just started 8/15/2025. No warning given.

Vehicle has had check engine light and engine reduced power flicking on and off for months, randomly reducing power on highway or nearly causing accidents. Brought car to GMC dealer, they said it was underboost code and needed new turbo. Paid over 7,000$ for repair. Next morning, same issue still was happening. I believe my vehicle has EMISSIONS recall issue “N192271200 Charge Air Cooler Disconnect at Throttle Body” but GM has not properly attached my vin number for this recall repair. I have poured thousands into repairs out of pocket and the same issue still persists. I believe strongly the recall emission issue is the problem and should be on my vin. Vehicle has been to dealer 3 times in the past 2 weeks, issue has not been fixed. Improperly diagnosed, random repairs made not fixing actual issue.

Back up camera service notice.

Service parking brake comes on, steering reduced. Problem reoccurring often, but intermittently. Actuators malfunctioning causing many sensors to fail off and on. Huge safety concern for myself, my riders, and anyone else on the road. When this happens my car has to “think” to move unless you clear the pop up message. Check engine light comes off and on at its leisure. When steering reduced comes on the car will not move until ready. This is clearly affecting electrical things as when I shut power off to other supplies it sometimes becomes more frequent as well as less frequent. The car does not understand what to do as its computers are confused at what the problem is, as the problem does not consistently happen. I have print outs of one time I caught it with failing actuators. I refuse to go to the dealership as I’m told “oh the problem isn’t happening now.” Which negates safety of all people on the roadways. You’re more than welcome to inspect. Though I will be present as I refuse to be told there’s no problem. As previously stated this happens when it wants to happen, but again I’ve caught the issue and can supply information.

Blue screen with the message "Service Rear Vision System"

Backup camera stopped working, giving me a blue screen

Headlights flicker when auto stop releases and clicks back on to move the vehicle. This happens when it wants too but usually at the same time service parking brake will pop up, followed by steering is reduced, drive with care.. Lets see what else. Carplay no longer works. No sound. sd card error pops up. Car will not play music through a cord but will via bluetooth, but charges a phone. OnStar light flickering between green and red until I turned off power to the liftgate. (manually clicking over knob to disable) Headlights flickering can cause accidents. Sure hope there's no epileptics out. Yes, orielly. I have documentation, photos, videos, take your pick I'm here to help. Not evaluated at dealer or mechanic, who can afford labor rates? This has been happening for months and I will continue to report till something is done or lives are cared about.

It began with showing "Service Brake Assist" for about 2 weeks + then on Dec 18th 2023 around 10:30 as my fiancé was stopped at a stoplight and all of sudden when the light turned green she attempted to continue forward as traffic started to move only to stall stalled out before any movement could be achieve the battery was reading severely depleted and the vehicle would not function at all she was stuck in Drive and could not put the vehicle in neutral or even park to even try to restart the vehicle, she could not even turn the steering wheel, roll down the windows, open the door, or anything. the only thing she was able to accomplish was opening the hood so an officer that had arrived at this time could give her a jump, The officer also proceeded to leave the negative cable on the battery terminal and disconnected the Positive cable from the battery terminal which would have indicated a bad starter or depleted battery when the positive cable had been removed, which was not the case. she continued to where her appointment was and that is where i met her and took over vehicle to transport it home, driving with hazards on. I arrived at the house with no incident. then at 4:45pm on the evening of 12/18/2023 while at the stoplight I had a similar issue occurred as i was going from a stationary position to a forward slowly accelerated speed gaining momentum where the vehicle wanted to stall out while i was stopped at a stoplight attempting to proceed forward. and then at around 10:20 pm while stopped at a stop sign a similar issue occurred as i was going from a stationary position to a forward slowly accelerated speed gaining momentum attempting to proceed forward. On Dec 19th 2023 around 10:00 am I test started the car by remote and it started up and then i turned it off, now it is showing that the battery is completely depleted at 1:26 pm

The Infotainment System started acting strange. The volume adjusts itself. It starts blaring very loudly and has nearly caused several collisions and it continuously turns on and off. I can not use it at all.

The car cuts off during driving and when u crack it back up the dash light do not work. But then the dealership said its a known issues but the car just needs to be reset...... but cutting off while driving can be dangerous. It's something a car should not do

When I’m reverse screen shows blue and message says “service rear camera system” I purchased this car NEW in 2019 and warranty just expired. I have read so many forums with this being a common problem with gmc. Why this isn’t covered and over $600 coming out of my pocket to fix it is ridiculous. This is a safety issue and gmc flaw and should be corrected/covered by them.

I was driving through a four way intersection with my children and the breaks locked up and I couldn’t get to a stop. This was the middle of September: There are MULTIPLE complaints on this happening with my model and someone is going to die if it’s not recalled. This is a serious safety concern. There was NO warning, or light to prepare me for the problem. Please do something to help us.

The contact's wife owns a 2019 GMC Terrain. The contact stated that upon making a left turn, the steering wheel would forcefully jerk to right, thrusting the vehicle into the opposite direction. The contact stated that the service ESC and service brake assist warning lights were illuminated. The warning lights would disappear soon after the failure as well as upon restart. The contact had taken the vehicle to the dealer on multiple occasions where he was repeatedly informed that unless the service light was illuminated upon arrival to the dealer, they would be unable to service the vehicle. The vehicle remained in the possession of the dealer and was not repaired. The manufacturer had yet to be notified of the failure. The failure mileage was unknown.

A COUPLE WEEKS AGO I GOT IN MY 2019 GMC TERRAIN AND SHIFTED INTO REVERSE AND MY BACK-UP CAMERA WAS NOT WORKING. IT WAS A BLUE SCREEN THAT SAID "SERVICE REAR VISION SYSTEM". A COUPLE DAYS LATER IT STARTED WORKING AGAIN. MY CAR SAT FOR A WK AND I GOT IN IT ON MAY 28 TO HELP MY DAUGHTER MOVE AND IT WASN'T WORKING AGAIN. THIS IS A SERIOUS SAFETY ISSUE NOT ONLY TO ME, BUT TO ANYONE (LIKE MY GRANDKIDS) OR ANYTHING BEHIND MY CAR AS I'M BACKING UP, ESPECIALLY IF I CANNOT SEE THEM.

While driving the car cut off on us. Started the car and the dash lights were on. Also Navigation stopped working. Took the car to bellamy Strickland and they said no issues was found. Got the car back 12/02_2021 Car seems to be ok at the moment. Melissa at bellamy stated it could have been a computer glitch. Car only has 20k miles on it.

Driving down load. Brake pedal got stiff as a rock. Brakes started to lock up. Almost caused a collision, as the car would not stop

BOUGHT THE TERRAIN IN NOV 22ND 2020 AT COVINA CHEVROLET, CALIFORNIA. ON NOV 25TH WANTED TO RESTORE THE CAR STEREO BECAUSE THE SETTINGS WOULD NOT DELETE DATA SAVED AND IT WOULDN'T CONNECT TO MY IPHONE VIA USB. SO I DECIDED TO DISCONNECT THE POSTS FROM THE BATTERY TERMINALS FOR 30 MINUTES. CONNECT BACK THE POSTS TO BATTERY AND CHECK IF THAT DELETE EVERYTHING AND IT DID BUT IT STILL WOULDN'T CONNECT TO MY IPHONE. THAT'S WHEN I NOTICED THAT SRS AND SERVICE ESC MESSAGE CAME ON. THE ABS, AIRBAGS AND STABILITY LIGHTS WERE ON, TURN OFF THE VEHICLE AND TURN IT BACK ON AND DIDN'T FIX THE ISSUE. I MADE A REPAIR SCHEDULE WHERE I BOUGHT THE VEHICLE AND TILL THIS DAY DEC 13TH THEY HAVEN'T FIXED THE ISSUE OR THEIR NOT EVEN TRYING. SERVICE ADVISOR ADVISE ME THAT THEY ARE GETTING IN TOUCH WITH A FIELD GM ENGINEER THAT WAS A WEEK AGO. I'M THINKING ITS JUST THE COMPUTER THAT IS FROZEN A MALFUNCTION ABS MODULE CONTROLLER OR A FUSES OR A RELAYS BECAUSE I DROVE THE VEHICLE TO THE DEALER AND HAD NO ISSUE. I LIVE IN OXNARD, CALIFORNIA AND ITS ABOUT 1HR 30MIN FROM THE DEALER. I'M STILL HOPING THAT THEY CAN FIX THE ISSUE BECAUSE I REALLY LIKE THIS VEHICLE. PLEASE HELP GM!!

9/30/20 DRIVING HOME AND WAS ACCELERATING TO PASS ANOTHER VEHICLE, THE TCS AND STABILITRAK LIGHTS CAME ON AND CHECK ENGINE LIGHT BEGAN TO FLASH. A BRIEF MESSAGE POPPED UP TO SERVICE THE TCS SYSTEM AND WENT AWAY. CHECK ENGINE LIGHT STOPPED FLASHING BUT TCS & STABILITRAK/TRACTION LIGHTS REMAINED ON. I STOPPED THE VEHICLE AS SOON AS I COULD, TURNED IT OFF, WAITING A FEW MINUTES AND RESTARTED - ALL LIGHTS HAD TURNED OFF. PROBLEM HAS NOT REPLICATED, BUT AM SCHEDULED FOR SERVICE (OIL CHANGE) AT DEALER TASCA BUICK GMC SAT OCT 3RD, WILL DISCUSS DURING SERVICE APPOINTMENT. (I COMMUTE DAILY ROUND TRIP 120 MILES) THIS IS EXTREMELY WORRISOME)

TWO INCIDENT WARNINGS ON MY DASHBOARD SAYING OF MY BACK HATCH WAS OPEN WHEN IT WAS NOT. HAD IT SERVICED BECAUSE THE DASH WARNING WOULD NOT SHUT OFF. SERVICE SAID IT WAS FIXED THEN HAPPENED AGAIN. TWICE THIS HAPPENED INTERMITTENTLY. ANOTHER INCIDENT WHEN ON NAVIGATION SCREEN, WHEN THE NAVIGATOR GAVE DIRECTIONS IT CHANGED TO PHONE SCREEN AND WENT BACK TO NAVIGATION SCREEN WHEN SHE STOPPED TALKING, LIKE SHE WAS CALLING ME TO VERBALLY GIVE ME DIRECTIONS! THE MOST WORRISOME WAS AS I WAS GOING 50 MPH ON CITY STREET, MY GAS PEDDLE STOPPED ENGAGING WITH THE ENGINE AND I WAS LOOSING SPEED, AS I PRESSED ON THE GAS PEDDLE HARDER THE CAR WAS DECREASING IN SPEED AS I WATCHED THE SPEEDOMETER. DURING THAT INCIDENT ALL WAS WORKING INCLUDING BRAKES, RADIO AND STEERING. I PROCEEDED TO DRIFT INTO A DRIVEWAY TO STOP THE CAR FOR HELP, GOOD THING I WAS NOT ON THE FREEWAY COULD HAVE GOTTEN KILLED. THE CAR IS GETTING SERVICED NOW, I DO NOT WANT IT BACK, WILL TRADE IN FOR DIFFERENT MAKE/MODEL IS THIS CONSIDERED A LEMON AND WHICH LAWS/ACTION DO I TAKE? I'VE ONLY HAD THE CAR ONLY 7 MONTHS WHEN THIS STARTED TO HAPPEN.

TL* THE CONTACT OWNS A 2019 GMC TERRAIN. THE CONTACT STATED THAT WHEN THE AIR CONDITION WAS ACTIVATED, THERE WAS AN ABNORMAL CHEMICAL BURNING ODOR COMING THROUGH THE VENTS, CAUSING HE AND HIS WIFE TO GET HEADACHES. THE VEHICLE WAS TAKEN TO MEADOWLAND OF CARMEL GMC (1952 US-6, CARMEL HAMLET, NY 10512) HOWEVER, WAS NOT DIAGNOSED FOR THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE CONTACT STATED THAT WHEN THE VEHICLE WAS FIRST PURCHASED AND THE ODOR WAS FIRST EXPERIENCED, THE DEALER REFUSED TO REPLACED THE VEHICLE WITH ANOTHER VEHICLE. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 24,000. THE VIN WAS NOT AVAILABLE.