NHTSA Complaint #11181719 — 2015 GMC SIERRA 1500

WHEN I FIRST GOT THE TRUCK THE BRAKES OPERATED PERFECTLY FINE AFTER ABOUT THREE DAYS THE BRAKES ON THE FRONT OF THE TRUCK WOULD LOCK UP WHILE I WAS DRIVING AND WOULD NOT RELEASE. AFTER TWO SETS OF CALIPERS TWO SETS OF BRAKE PADS A SET OF ROTORS A TWO WEEKS GO BY WITH THE MECHANIC TRYING TO FIGURE OUT WHAT IS WRONG WITH THIS TRUCK. THEY THEN REPLACE THE BRAKE MASTER CYLINDER, THERE WAS NO IMPROVEMENT. TURNS OUT TO BE THE BRAKE BOOSTER HAD FAILED ALONG WITH THE HYDRAULIC ABS CONTROL UNIT. THERE WERE NO WARNING LIGHTS ON WHATSOEVER THE WHOLE ENTIRE TIME THE BRAKES WERE LOCKED UP THE ABS LIGHT DIDN'T COME ON UNTIL THE BRAKE BOOSTER WAS REPLACED INDICATING THAT THE ABS CONTROL UNIT WAS ALSO BAD. NOW I AM EXPERIENCING A TICKING COMING FROM THE ENGINE. THE TICKING OCCURS AT IDLE END AS THE THROTTLE IS BEING ACTIVATED. HOWEVER THE LOCAL DEALERSHIP HAS REFUSED TO GIVE ME ANY INFORMATION AS OF WHY IT COULD BE MAKING THIS TICKING NOISE OR IS JUST UNWILLING TO SAY ANYTHING .