2012 GMC TERRAIN Electrical System Problems

1. The engine suddenly lost power while driving during evening rush hour and the vehicle would no longer accelerate. 2. Because the vehicle could not maintain speed, I was unable to keep up with traffic, creating a serious safety hazard that could have resulted in a major accident. 3. The vehicle has been inspected by an independent service center for diagnosis. 4. During the incident, the “Engine Power Reduced” warning indicator illuminated just before the loss of power occurred. 5. As the vehicle slowed and came to a complete stop at an intersection, it remained unresponsive. When the traffic light turned green, the vehicle would not accelerate at all.

The display screen of GPS/Radio is blackout combined intermittent control button illuminating light went off( include emergency, A/C control), backup camera stopped working, turning signal lost click sound. Safety concern: 1. Emergency and A/C control buttons lost illuminating light(Causing night driving difficult.). 2. AC vent the temperature control lost visual status cause distraction of normal driving. 3. Lost Backup camera function which is supposed to be an assisted safety feature. 4. Lost turning signal click sound which leads to missing alert of turning signal malfunction. 5. Complete audio loss create unsafe for long trip driving. 6. GM doesn't provide genuine replacement part. This problem started from 2018 till now. I've contacted GM with no meaningful resolution. I visited the dealer and the only thing they could do is replace non guaranteed refurbished head unit with hefty price. I did some research online and found there are a lot of same...

When I stop at the light my car shake and rocks, then the car goes into limp mode. Where the stabilitrack comes on and the engine goes into reduced mode. And I can't go over 30mps. When this happened on the freeway is the most dangerous and scary feeling ever. I've got So many new parts and put over 3,000 into the car and it still has this issue. I've been do several different mechanics and nobody can figure out what's wrong. Gm needs to look into this, it's so many forums going on for this issue.

The check emissions light for the engine light came up on the dashboard. Without prior warning or other signs the vehicle lost engine power in the middle of the road. The entire electrical power and engine stopped working and the brakes jammed. This causes the vehicle to become unstoppable in the middle of the road causing a safety hazard to the vehicle, driver, passengers and fellow vehicles on the road. The only way to stop the vehicle is somehow use the gears to shift to parking position, turn the engine again on and try to remove the vehicle from the middle of the road.

Over the past couple years I have become worried to even drive this vehicle. Well Taken care of and maintenance completed regularly. This vehicle has been in the shop 7 times in the past couple years but no one can tell me exactly what is going on. Only 1 place has told me that I need extensive electrical work but couldn't tell me what exactly the problem was. Issue #1: When coming to a stop, and/or idle, the engine seems to give up and vehicle shuts off. Issue #2: When started Engine sounds like a.high pitch raddle. Issue #3: Occasionally, while driving on the interstate going around 60 - 65 mph the electrical inside the vehicle will flash and everything shuts off and the emergency brake is applied automatically. This has become dangerous - if I wasn't wearing a seatbelt I could have been thrown through the windshield. Issue #4:...

My vehicle has excessive oil consumption including the need for frequent oil refilling, combined with audible rattle and knocking sound.

DURING A BAD STORM THE WINDSHIELD WIPERS WENT PAST THE WINDSHIELD AND THE MOTOR FROZE UP MOTOR STARTED HUMMING THEN LOCKED UP.

STATIONARY SENSOR LIGHTS COME ON STEERING MONITORING WARNING ALSO REDUCED ENGINE POWER THEN DOESN'T COME ON AFTER TURNING OFF AND IT DOESN'T TURN OFF LIKE IT SHOULD IT IS LIKE THE ENGINE BEGINS CHOKING.

THE DEFROSTER WILL NOT SWITCH AIR FLOW TO VENT. THIS CAUSES THE ENTIRE CAR TO FOG UP CONSTANTLY ESPECIALLY THE WINDSHIELD DURING RAIN OR HUMID WEATHER. THIS OBSTRUCTS VIEW AND CREATES A LIFE THREATENING HAZARD. THIS HAPPENS WHILE DRIVING CONSTANTLY ON HIGHWAY I SIDE STREET.

RECENT PROBLEMS WITH MY 2012 GMC TERRAIN ALL-WHEEL-DRIVE PVC VALVE CAUSED REAR MAIN SEAL TO CONSUME OIL AND GASKET BLEW OUT DRIVERS SEAT WILL NOT MOVE FORWARD OR BACKWARDS VISOR ON DRIVERS SIDE WILL NOT STAY UP ALSO ELECTRICAL PROBLEMS

VEHICLE SHUTS OFF WHEN SLOWING TO A STOP AND HAVE TO RESTART IN ORDER TO ACCELERATE. THAT WAS LOOKED AT AND 'FIXED' AND NOW THE VEHICLE SHAKES WHEN SLOWING DOWN AND HEADLIGHTS DIM AS IF IT IS TRYING NOT TO SHUT OFF. ENGINE IS VERY ROUGH AND RATTLES WHILE STARTING TO ACCELERATE AND ACCELERATING. WHEN BRAKES ARE PUSHED THE CAR STARTS TO TURN OFF WHILE IN MOTION. WHEN STOPPED, CAR SHAKES AND THERE IS A VERY HARD KNOCKING COMING FROM THE ENGINE.

EMISSION CONTROL HAS WENT OUT TWICE WITHIN 3 MONTHS OF BEING FIXED. CAM SHAFT BOTH SIDES HAD TO BE REPLACED. 4 TIMES WITH 6 MONTHS THE FUEL LIGHT HAS CAME ON STATING THE CAP NEEDS REPAIRED, EVEN THOUGH IT WAS REPLACED. ALTERNATOR, BATTERY HAS BEEN REPLACED OCTOBER 2019, WHILE IN ANOTHER SATE. ENGINE LIGHT HAS BEEN ON SINCE I PURCHASED IT IN FEB. 2019. ELECTRICAL SHORTAGE BECAUSE OF PREVIOUS RIGHT SIDE DAMAGE. THROTTLE HAS WENT OUT, WHILE DRIVING 65 ON HIGHWAYS. STABILITY CONTROL STOPPED WORKING. CRANKSHAFT WAS REPLACED. EXHAUST LEAK. BODY CONTROL SHORT, JERKING WHILE DRIVING, TIMING WARNING

TAKATA RECALL MY CAR HAS BEEN THROWING A ENGINE POWER REDUCED AND SERVICE STABIL TRAK LIGHT. I HAVE HAD IT IN THE SHOP FIVE TIMES NOW, AFTER REPLACING A COOLANT SENSOR WHICH IS A CODE IT THROUGH, IT HAS THROWN THREE PEDAL SENSORS, AFTER REPLACING IT THE FIRST TIME THE MECHANIC PLACE TOLD ME THE PEDAL WAS BAD, SENT IT BACK REPLACED IT AGAIN AND THE LIGHT CAME BACK ON. THIS HAS BEEN GOING ON SINCE THE BEGINNING OF MAY AND STILL NOT RESOLVED. I HAVE READ SEVERAL OTHER PEOPLE POST ABOUT THIS ON THEIR TERRAINS.

IN MAY 2018 MY REAR CAMERA AND BACKUP LIGHTS STOPPED WORKING. WHEN I WENT TO THE DEALER, THE DEALER TOL ME THAT THE REAR CAMERA WAS BAD AND IT WAS TIED TO THE BACK UP LIGHTS. THEY WOULD NOT FIX IT FOR FREE. I WAS CHARGED $175 DOLLARS TO DISCONNECT THE CAMERA. THE CAMERA SHOULD BE LINKED TO THE BACKUP LIGHTS WHEN IT MALFUNCTIONS. I ALMOST HIT A PERSON BECAUSE THE BACKUP LIGHTS WOULD NOT TURN ON THIS IS A SERIOUS DEFECT. SUNRISE CHEVY SHOULD NOT HAVE CHARGED ME FOR THIS PROBLEM.

WHILE DRIVING THE VEHICLE, I EXPERIENCED STRONG KNOCKING VIBRATIONS AND SOUNDS SEEMINGLY COMING THROUGH THE FLOORBOARD. AS I CONTINUED DRIVING FOR ABOUT 5 MILES TRYING TO GET HOME, THE KNOCKING BECAME MORE PRONOUNCED AND MY STEERING WAS AFFECTED. I ALSO BEGAN NOTICING AN EXTREMELY STRONG ODOR NECESSITATING LOWERING WINDOWS TO BREATHE. I NOTIFIED MY DEALERSHIP AND TOOK THE VEHICLE IN FOR DIAGNOSIS THE VERY NEXT MORNING WITHOUT DRIVING IT AFTER ARRIVING TO MY GARAGE. I WAS TOLD THE AWD HAD COMPLETELY DETERIORATED. MY CONCERN WAS THAT I NEVER RECEIVED ANY DASHBOARD NOTIFICATION OF THE PROBLEM, NOT DID MY ONSTAR DIAGNOSIS INDICATE A PROBLEM. I HAVE BEEN QUITE DISTURBED THAT THE VEHICLE BECAME DISABLED BEFORE I WAS AWARE OF ANY PROBLEM. I HAVE TAKEN MY VEHICLE IN FOR REGULAR MAINTENANCE AT MY GMC DEALERSHIP AND WOULD LIKE AN EXPLANATION REGARDING THE FAILURE TO IDENTIFY THIS PROBLEM THROUGH THE REGULAR MAINTENANCE CHECKS....

THE LOW BEAM H11 BULB IS CAUSING THE (MALE/FEMALE PLUG IN) FOR THIS COMPONENT TO OVERHEAT CAUSING THE PLASTIC TO BECOME CHARRED, PARTIALLY MELTED AND BRITTLE IN WHICH THE LOW BEAM LIGHT STOPS WORKING DUE TO THIS PROBLEM. THE WIRING IS BECOMING SOFT AT THE PLUG IN CONNECTION FROM THIS HEAT AND ALLOWING THE PROTECTIVE WIRE INSULATION TO BE MELTED PERMITTING THE BARE WIRE TO BE VISIBLE WHICH COULD PRODUCE A FIRE HAZARD AT THIS LOCATION. THIS HAS OCCURRED ON THE RIGHT SIDE TWICE AND ON THE LEFT SIDE ONCE. IN ALL THREE CASES, THE BULBS WITH THE FEMALE PLUG IN AND THE MALE ELECTRICAL CONNECTION HAS BEEN REPLACE. THIS VEHICLE HAS ONLY 28755 MILES ON IT. JUST NOTICED THE LOW BEAM LIGHT ON RIGHT SIDE NOT WORKING AGAIN TODAY. REPLACED THIS SIDE WITHIN THE LAST 9 MONTHS.

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...

TOOK MY 2012 TERRAIN IN FOR THE EXCESSIVE OIL BURN IN MAY 2017. SEVERAL TIMES BEFORE THE CAR WOULD NOT START. I WAS TOLD BY DEALER IT WAS DUE TO THE OIL BEING LOW DUE TO BURN WITHIN 1000 MILES OF CHANGE. ABOUT A MONTH AFTER GETTING IT BACK IT STARTED RANDOMLY NOT STARTING. I FIRST THOUGHT IT WAS THAT I LEFT THE DOME LIGHTS ON. THEN IT WOULD HAPPEN WHEN I USED MY BACK GATE, THEN RANDOMLY AFTER OPENING ANY DOOR BUT THE DRIVERS WHEN THE CAR WAS NOT ON. EVERYTHING WAS WORKING BUT THE CAR WOULDN'T START. IT WAS ALL RANDOM. CHECK ENGINE LIGHT CAME ON AND IT READ GAS CAP, SO I CHANGED THAT AS I WAS TOLD THAT COULD CAUSE THE CAR NOT TO START. IT DIDN'T HELP AND IT RESUMED NOT STARTING WITHIN DAYS. SO I HAVE BEEN STARTING CAR TO OPEN ANY OTHER DOORS...

MY 2012 GMC TERRAIN HAS BEEN STALLING FOR A FEW DAYS NOW THE STABILLTRACK SENSOR WAS REPLACED THIS YEAR THE ENGINE LIGHT COMES ON AND OFF. AND MY RADIO SOMETIMES CUTS OFF ON IT'S OWN BUT NOW MY KEY KEEPS GETTING STUCK IN THE IGNITION SWITCH AND THE CAR KEEPS STALLING BUT WHEN I GET A JUMP IT STARTS WITH NO PROBLEM BUT ONCE IT STALLED WHEN I WAS DRIVING THANK GOD I WAS A FEW BLOCKS FROM HOME . THEN WHEN I TRY TO START AGAIN IT WON'T START. IT'S ONLY 5YRS. OLD I'VE READ MANY COMPLAINTS ABOUT THIS MODLE. I THINK I BOUGHT A LEMON 😕

ON VARIOUS OCCASIONS WHEN SLOWING DOWN OR TURNING, THE ENGINE WILL DIE. FRONT END ACCIDENT GOING 55+ MPH ON A COUNTRY ROAD, HIT A VERY LARGE DIP, AIRBAGS DID NOT DEPLOY, SEAT BELTS DID LOCK UP.

TL* THE CONTACT OWNS A 2012 GMC TERRAIN. WHILE DRIVING 55 MPH, THE CHECK ENGINE INDICATOR ILLUMINATED. ALSO, THE VEHICLE WOULD OCCASIONALLY FAIL TO START WITH THE REMOTE STARTER. THE VEHICLE WAS TAKEN TO AN AUTO PART STORE AND DIFFERENT FAILURE CODES APPEARED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURES. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 95,000.

I HAVE HAD THIS CAR FOR LESS THAN A YEAR, BOUGHT FROM A DEALER, AND I HAVE CHECKED THE BACKGROUND TO WHICH THERE HAVE NOT BEEN ANY TYPE OF ACCIDENT OR DAMAGE FROM WHAT WAS PROVIDED TO ME. IT RANDOMLY STARTED SHAKING UNCONTROLLABLY AND SHUTTING OFF WHILE I WAS DRIVING. NOW MIND YOU, AS A PREGNANT WOMAN DRIVING ON THE HIGHWAY, THIS IS NOT SAFE. MY ENGINE LIGHT TURNED ON. THOUGH I COULD HAVE GOTTEN IN AN ACCIDENT, BY THE GRACE OF GOD PEOPLE MOVED OUT THE WAY AND ALLOWED ME TO GET OFF AND TO THE SIDE.

TL* THE CONTACT OWNS A 2012 GMC TERRAIN. THE CONTACT STATED THAT THE AIR CONDITIONING WAS NOT WORKING AND LEAKED INSIDE THE VEHICLE ON BOTH SIDES DURING THE SUMMER MONTHS. THE CONTACT ALSO STATED THAT THE HEATER DID NOT WORK IN THE WINTER. THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT MECHANIC WHO COULD NOT DETERMINE THE NATURE OF THE FAILURE. THE MANUFACTURER WAS NOT NOTIFIED. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 27,000.

I HAVE HAD ISSUES WITH THIS VEHICLE EVER SINCE ITS PURCHASE 01/2015. I TOOK THE VEHICLE IN FOR SERVICE AND WAS TOLD THE SERVICE CONTRACT WOULD NOT COVER MY ISSUE AND THAT THE ISSUE WAS CAUSED BY LACK OF MAINTENANCE, WHICH IS NOT THE CASE AS I MAINTAIN THE OIL IN THIS VEHICLE AND EVEN HAD TO PURCHASE A NEW BATTERY FOR THE VEHICLE RECENTLY.THIS CAR'S ENGINE REPEATEDLY STOPS, ESPECIALLY WHEN APPROACHING A RED LIGHT OR STOP SIGN OR AT THE MOMENT OF ACCELERATION. I HAVE HAD TO AVOID MANY ACCIDENTS DUE TO PEOPLE DRIVING UP ON ME BECAUSE I SHOULD HAVE BEEN ACCELERATING AT THE TIME BUT MY CAR TURNED OFF. THE BATTERY WOULD DIE ON THIS CAR ON A WEEKLY BASIS WHICH CAUSED ME TO PURCHASE A BATTERY AND THERE IS STILL NO PROGRESS IN THE VEHICLE. THE MOTOR KNOCKS BADLY UPON STARTUP, ESPECIALLY IN THE MORNINGS. THE...

I PURCHASED MY 2012 GMC TERRAIN FROM CLAY COOLEY IN IRVING, TX ON 01/05/2015 WITH AN EXTENDED SERVICE CONTRACT. I HAVE HAD ISSUES WITH THIS VEHICLE EVER SINCE. I TOOK THE VEHICLE IN FOR SERVICE AND WAS TOLD THE SERVICE CONTRACT WOULD NOT COVER MY ISSUE AND THAT THE ISSUE WAS CAUSED BY LACK OF MAINTENANCE, WHICH IS NOT THE CASE AS I MAINTAIN THE OIL IN THIS VEHICLE AND EVEN HAD TO PURCHASE A NEW BATTERY FOR THE VEHICLE RECENTLY. I AM ATTACHING A PICTURE OF THE CONDITION OF THE BATTERY SHORTLY AFTER THE VEHICLE WAS SOLD TO ME TO WHERE I CONTACTED MY SALES AGENT AND HE ADVISED ME TO CHECK MY SERVICE CONTRACT. THIS CAR'S ENGINE REPEATEDLY STOPS, ESPECIALLY WHEN APPROACHING A RED LIGHT OR STOP SIGN OR AT THE MOMENT OF ACCELERATION. I HAVE HAD TO AVOID MANY ACCIDENTS DUE TO PEOPLE DRIVING UP ON ME...

WON'T START, GET A "CHECK POWER STEERING"LIGHT.

CAR DIE (STALL) AT IDOL AFTER WARMED UP DRIVE IT 10 MILES STOP AT STOP SIGN IT DIE RESTART DIE AGAIN MAY DO THAT 3-4 TIMES BEFORE IT WILL TAKE GAS AND RUN DOES THIS INTERMEDITLY RUN FINE FOR HALF A DAY STOP RUN IN STORE COME OUT RESTART AND IT DIE (NO CHUGGING JUST DIE) AUTO PARTS STORE SAID IT WAS A CRANKSHAFT SENSOR WHEN THEY CHECKED WHAT HAD THE CHECK ENGINE LIGHT ON (NOTE CHECK ENGINE LIGHT NOT COME ON EACH TIME IT STALLS)

TL* THE CONTACT OWNS A 2012 GMC TERRAIN. WHILE DRIVING AT APPROXIMATELY 25 MPH, THE TRACTION CONTROL AND THE STABILITY TRAC WARNING LIGHTS ILLUMINATED AND THE VEHICLE STALLED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 68,000.

GMC REFUSES TO HELP. I AM CONTACTING BECAUSE I OWN A 2012 GMC TERRAIN AND WE JUST STARTED HAVING ISSUES WITH OUT RADIO WHERE IT WILL TURN ON EVEN WITH THE CAR OFF. OUR GMC DEALER SAID THAT THEY HAVE SEEN THIS ISSUE ALOT AND SINCE MY VEHICLE JUST CAME OUT OF WARRANTY IN FEB. IT WILL COST US $150. WHAT CAN WE DO SINCE THIS IS A FAULT IN THE RADIO FLASHING NOT SOMETHING WE HAVE DONE. IF THE RADIO TURNS ON WHILE THE CAR IS OFF WHAT ELSE WILL START DOING THAT. *TR

WE HAVE HAD THE GMC TERRAIN SHUT DOWN TWICE WHILE DRIVING. BOTH TIME THE CAR CENTER CONSOLE GOES COMPLETELY BLACK AND YOU HAVE NO CONTROL OVER THE VEHICLE. WE BROUGHT IT IN FOR SERVICE BUT THEY COULD NOT FIND ANYTHING WRONG, AFTER THE SECOND TIME THEY STILL FOUND NOTHING WRONG BUT THEY DECIDE TO REPLACE THE CARS INTERNAL COMPUTER. THE ISSUE WAS REPORTED TO CORPORATE GM BUT NOT MUCH WAS MADE IF IT. AFTER ALL THE NEWS WITH OTHER GM VEHICLE I'M CONCERNED THIS THAT THIS MAY BE HAPPENING WITH OTHER GMC TERRAIN VEHICLE. MY WIFE WHO IS THE PRIMARY DRIVER IS VERY FRIGHTEN TO DRIVE THE CAR SINCE THIS. IF YOU HAVE ANY FURTHER QUESTION PLEASE FEEL FREE TO CONTACT ME. *TR