2016 GMC Sierra Denali

APPARENTLY, THE 8 SPEED AUTOMATIC TRANSMISSION HAS ISSUES WITH WIRING HARNESS AND HARD SHIFTING WHICH THE MANUFACTURER HAS 18 SERVICE BULLETINS OUT ON YET STILL WILL NOT RECALL AND FIX PROBLEMS. ALSO THE BRAKE SYSTEM IS FAULTY AND UNSAFE IT LOSES PRESSURE AND EVEN BRAKING AT VARIOUS SPEEDS. AFTER TAKING IT TO THE DEALERSHIP THEY CAN NOT FIGURE OUT WHY AND SAY IT IS VARIOUS PARTS AND SHOULD BE RECALLED BUT IT IS NOT AS OF YET. GM KNOWS OF THESE ISSUES AND THE 1000S OF DOLLARS CUSTOMERS HAVE TO PAY FOR THESE REPAIRS. THIS IS WRONG AND NEEDS TO BE RECTIFIED.

SINCE I'VE OWNED THIS VEHICLE I HAVE HAD TRANSMISSION PROBLEMS. ONCE IT WENT FROM 70 TO 20 ON THE HIGHWAY.. IT KICKS OR JERKS AT ANY SPEED... ESPECIALLY GOING SLOW.. THE SHIFTING IS HORRIBLE!!! THE FEELING OF IT LOSING POWER AGAIN LIKE IT DID COULD CAUSE SERIOUS DAMAGE TO THE TRANSMISSION AND UNSELFISH AND PASSENGERS.. I DON'T TRUST IT ON THE HIGHWAY!!! I KEEP A MONITOR CONNECTED TO MY TRUCK AT ALL TIMES.. THE DATES COINCIDE WITH THE PAPERWORK!! ONGOING TRANNY ISSUES ALL THE TIME!! I PAID WAY TO MUCH FOR THIS LEMON!! ENGINE VIBRATES AROUND 80.. AND IF YOU DON'T USE YOUR BLINKER.. THEY TRUCK FIGHTS YOU TO CHANGE LANES.. IT PULLS YOU BACK!!

BRAKE FAILURE ISSUE AT LOW SPEED. THIS HAPPENED IN TWO SEPARATE OCCURRENCES IN PARKING LOTS. THE BRAKE PEDAL BECAME VERY STILL AND REQUIRED GRABBING THE STEERING WHEEL AND USING IT TO PULL MYSELF DOWN HARDER ON THE BRAKE PEDAL TO GET THE VEHICLE TO STOP. THIS RESULTED IN GREATLY INCREASED STOPPING DISTANCE. FORTUNATELY NO VEHICLES OR PEOPLE WERE IN MY PATH DURING THESE OCCURRENCES. GM HAS SINCE REPAIRED MY VEHICLE. I HAVE SINCE RECEIVED A NOTICE THAT THEY ARE REPAIRING THIS ISSUE ONLY AFTER THE OWNER HAS A BRAKE FAILURE PROBLEM. THIS IS EXTREMELY UNSAFE AND IS UNACCEPTABLE. OWNERS NEED A SOLUTION AND DO NOT NEED TO WORRY THAT THIS ISSUE WILL ARISE AGAIN. IF I HIT A PERSON OR A VEHICLE, WILL GM PAY FOR MEDICAL BILLS, VEHICLE REPAIRS, LEGAL FEES? THIS TRUCK AS WELL AS MY LAST 2009 CHEVROLET SILVERADO HAD ISSUES WITH THE DRIVE TRAIN THAT GM CLASSIFIED AS NORMAL. THESE TRUCKS SHOULD NOT HAVE DRIVE SHAFT CLUNK WHEN STOPPING AT A TRAFFIC LIGHT. THESE VEHICLES HAVE MAJOR MECHANICAL CONCERNS AND THEIR QUALITY IS TRASH!

8 SPEED TRANSMISSION BUCKS, HESITATES, LURCHES FORWARD, CLUNKS, WHILE STARTUNG ACCELERATION OR COMING TO A STOP. I TRY TO KEEP A BIG GAP BETWEEN MY TRUCK AND CARS IN FRONT OF ME AT STOP SIGNS BECAUSE IT RANDOMLY LURCHES FORWARD AND I ALMOST HAVE BUMPED CARS IN FRONT OF ME. I HAVE HAD THE TRUCK INTO THE DEALER SO MANU TIMES TO FIX THE VIBRATION ISSUES AS WELL, THEY SAID 3 TIRES THAT CAME IN THE BRAND NEW TRUCK WERE DEFECTIVE SO I HAD TO REPLACE THEM ALL AND THE SHAKE IS STILL THERE, THE BALANCED, REBALANCED, ROAD FORCE BALANCE AND NOTHING WORKS. LAST TIME AT THE DEALER SAID IT IS PROBABLY THE TIRES, HE SAID DONT ROTATE THEM AGAIN AND WHEN THEY WEAR OUT HE WILL PUT ME IN A 'BETTER' TIRE. I AM PAST MY WARRANTY SO THE DEALER SAYS ANY COSTS ARE MY RESPONSIBILITT, IF THE NHTSA COULD PLEASE STEP IN TO ASSIST US TO MAKE GM FIC THEAE VEHICLES WHICH ARE A SAFETY HAZARD.

TRUCK SHIFTS REALLY HARD AND IS UNPREDICTABLE. I ALMOST DROVE THROUGH MY GARAGE DOOR THE OTHER DAY SHIFTING TO DRIVE FROM REVERSE. TRUCK WILL LUNGE FORWARD OR DELAY IN SHIFTING. THERE HAVE BEEN A FEW TIMES I'VE HAD TO SLAM ON THE BRAKES BEFORE I BACKED INTO SOMETHING. I HAVE BROUGHT IT IN 3-4 TIMES FOR THE ISSUE AND GMC WON'T REMEDY THE PROBLEM.

THIS ISSUE STARTED A FEW MONTHS AFTER I PURCHASED THE TRUCK TOOK IT TO TWO DEALERS THEY SAY ITS NORMAL. CALLED GMC & THEY HAVE NO RECALL. WHEN DRIVING THE TRUCK & HAVE TO SLOW DOWN IN TRAFFIC THE AUTOMATIC TRANSMISSION DOWN SHIFTS & HAS A VERY NOTICABLE JERK. WILL ACTUALLY JERK THE HOLE TRUCK. PEOPLE WHO HAVE RODE WITH ME TELL ME I HAVE A TRANSMISSION PROBLEM. WHAT CAN I DO