PURCHASED 2013 GMC TERRAIN DENALI BRAND NEW; VEHICLE HAD APPROX 5000 MILES WHEN THIS INCIDENT TOOK PLACE. WHILE OUT TO MOUNTAINS AND JUST STARTING TO HEADING DOWN A STEEP GRADE ON A DIRT/GRAVEL ROAD (JUST STARTED MOVING AND WAS TRAVELING LESS THAN 5MPH), ABS KICKED IN AND WOULDN'T STOP, PREVENTING THE BREAK FROM BEING PRESSED. THIS CONTINUED FOR ABOUT A HALF MILE DOWN THIS STEEP GRADE ROAD WITH A CLIFF ON ONE SIDE AND A MOUNTAIN FACE ON THE OTHER. THE VEHICLE CONTINUED TO MOVE DOWN THE MOUNTAIN PICKING UP SPEED THE ENTIRE TIME. I TRIED EVERYTHING I COULD THINK OF TO GET THE ABS TO RELEASE THE BREAKS SO THAT I COULD USE THEM AGAIN. I TRIED TO PUMP THE BREAKS, SHIFTED FROM M1 TO DRIVE, THEN TO NEUTRAL, THEN TO REVERSE, ALL TO NO AVAIL. I ALSO TRIED TO JUST NOT DO ANYTHING, NOT TOUCH THE BREAKS, AND SEE IF THE BREAKS WOULD RELEASE AND I STILL CONTINUED DOWN THE MOUNTAIN WITHOUT THE ABILITY TO STOP. AFTER TRAVELING APPROX 1/2 MILE DOWN THE MOUNTAIN I HIT THE EMERGENCY BREAKS WHICH DID STOP THE VEHICLE. ONLY AFTER THE VEHICLE CAME TO A COMPLETE STOP DID THE BREAKS BECOME FUNCTIONAL AGAIN. THE VEHICLE WAS DAMAGED DURING THE RAPID DECENT DOWN THE MOUNTAIN SIDE. MY FAMILY AND I CAME VERY CLOSE TO DEATH THAT DAY AND ALL COULD'VE BEEN KILLED DUE TO THIS DEFECT. BUYERS SHOULD BE AWARE OF THIS ISSUE. *TR
2010
ENGINE
I WAS DRIVING THE VEHICLE ON THE HIGHWAY AND ALL OF A SUDDEN IT SLOWED DOWN TO ABOUT 20 MPH WITHOUT ANY WARNING. I LOOKED DOWN AND SAW THE TRACTION CONTROL LIGHT AND CHECK ENGINE LIGHT ON. IN THE MIDDLE OF THE DASHBOARD IT SAID ENGINE SPEED REDUCED. I BACKED DOWN AN ENTRANCE RAMP TO GET ONTO A LOCAL ROAD. AFTER 1 HOUR THE CAR WAS RESTARTED AND SEEMED OK. NOT LONG AFTER IT HAPPENED AGAIN. I TOOK IT TO THE GMC DEALER, THEY DROVE IT 47 MILES AND COULD NOT GET IT TO ACT UP.I GOT THE CAR BACK, DROVE IT 70 MILES HOME AND THE NEXT MORNING IT HAPPENED AGAIN, 3 MILES FROM MY HOUSE. I HAD IT TOWED TO THE DEALER. THE DEALER THEN REPLACED THE THROTTLE BODY ASSEMBLY FOR $540. IT HAS BEEN FINE FOR 2 WEEKS. IN 2010, GMC DECIDED NOT TO COVER THIS PART UNDER THE ENGINE WARRANTY (AS IT DID IN PREVIOUS YEARS) AND NOW ASSIGNS IT TO THE EMISSION SYSTEM WHICH IS NOT COVERED. I HAVE SEEN THIS PROBLEM LISTED ALL OVER THE INTERNET ON MANY VEHICLES. IT IS A DANGEROUS SITUATION WHEN THE CAR SLOWS DOWN LIKE THIS ON THE HIGHWAY. PLEASE ADD MY COMPLAINT TO THE LONG LIST OF PEOPLE WHO HAVE THIS PROBLEM. THANK YOU. *TR