What 77 owners told NHTSA about the 2014 GMC Yukon Denali Xl 1500

State Farm is investigating the accident to see what, if anything, malfunctioned in my braking system. I ran a red light but when I pressed the brake upon approach of the red light my brakes didn't catch and so when I pressed them, I kept going at the same speed. I was going between 30 and 40 miles per hour I believe. Three cars were involved. I have a sore neck, chest, and burn marks in my neck region. I suspect my truck will be totalled. We performed routine maintenance on the vehicle. It had a little over 100K miles on it at the time of this wreck. There is not a recall on braking for 2014 models, but I see there is one for 2015.

NHTSA ODI 11490343

WAS INVOLVED IN AN ACCIDENT UNABLE TO STOP IN TIME. UNINOW IF THIS IS RELATED TO THE BRAKE POTENTIAL RECALL BUT I HAVE NOTICED POTENTIAL STOPING DISTANCE CHANGES WHEN USING THE VEHICLE FOR LONG PERIODS I ASSUME IT IS JUST FROM USE. FIGURED THIS INFORMATION WOULD BE USEFUL WITH THE CURRENT INVESTIGATION

NHTSA ODI 11153615

AFTER SWITCHING TO PASSING LANE AND SEEING TRAFFIC IN LANE AT STANDSTILL I SWIFTLY JAMMED ON BRAKE PEDAL. BRAKES FAILED TO PROVIDE ADEQUATE STOPPING ABILITY AS THOUGH THEY WERE COATED WITH GREASE. DESPITE HAVING WELL IN EXCESS OF 100 FT THE VEHICLE WOULD NOT STOP. REAR ENDED VEHICLE IN FRONT WITH ABOUT 12K IN DAMAGE TO FRONT OF THE VEHICLE. AIR BAGS DID NOT DEPLOY. ORIGINAL ROTORS AND PADS WERE REPLACED AFTER EXPERIENCING SEVERE BRAKE FADING WHEN HOT PRIOR TO ACCIDENT. DRILLED AND SLOTTED RACING ROTORS WERE INSTALLED. AFTER THE VEHICLE WAS REPAIRED AND PLACED BACK ON THE ROAD, I TESTED WITH THE SAME BRAKES WITH A HARD STOP FROM 80 MPH. THE BRAKES WORKED SO WELL THE FORCE OF THE STOP WAS PULLING ME OFF MY SEAT. SEVERAL WEEKS LATER, I WAS CUT OFF BY ANOTHER DRIVER ON THE HIGHWAY DOING ABOUT 40MPH LESS THAN I WAS. I JAMMED ON THE BRAKES AND AGAIN THERE WAS INSUFFICIENT BRAKING LIKE BEFORE EXCEPT NO COLLISION. ONCE MORE I TESTED AT A HARD BRAKE FROM 80 MPH AND AGAIN IT STOPPED EXTREMELY WELL. APPARENTLY THE FAILURE OF SUFFICIENT BRAKING CAME WITH APPLICATION OF ABS SYSTEM OTHERWISE THE STOPPING POWER WAS EXCEPTIONAL. I STRONGLY URGE INVESTIGATION OF GM ABS BRAKING. I AM A PROFESSIONAL DRIVER WITH IN EXCESS OF 4 MILLION MILES WITH ALL CLASSES OF VEHICLES IN ALL EXTREMES. THE WORST DAMAGE I EVER HAD ON THE HIGHWAY WAS A BROKEN HEADLIGHT IN 1975 UNTIL THIS ACCIDENT. THE ACCIDENT SHOULD NOT HAVE HAPPENED AS MY REACTION WAS TIMELY AND THE DISTANCE TO STOP MORE THAN ADEQUATE. THE AIR BAGS FAILED TO DEPLOY DESPITE THE ENTIRE NOSE OF THE VEHICLE BEING DESTROYED AND PUSHED BACK TO THE ENGINE BLOCK. *TR

NHTSA ODI 10711913