NHTSA Complaint #10956693 — 2016 CHEVROLET COLORADO

SINCE PURCHASE OF VEHICLE, IT HAD A BUCKING AT SPEED OF 25-40 MPH, THIS WAS VERY NOTICEABLE IN CITY DRIVING, THIS ISSUE WAS COUPLE WITH UNCONTROLLED SURGES IN THE ENGINE. THE VEHICLE WAS PURCHASE OCT 28 OR 30, 2016. I TURNED IN THE VEHICLE FOR SERVICE ON DEC 19, 2016, DEALER SERVICE REP CONFIRM THERE WAS AN ISSUE AND KEEP THE TRUCK FOR REPAIRS. VEHICLE WAS IN THE SERVICE DEPARTMENT FOR OVER 40 CONSECUTIVE DAYS TO FIX ISSUE, DEALERSHIP TECHS, AS WELL AS GM FIELD REPS HAVE LOOKED AT THE VEHICLE AND HAVE TRIED TO FIX IT TO NO AVAIL. ON FEB 8, THE GM REP SAID THERE IS NOTHING WRONG WITH THE VEHICLE AND THE ISSUE WAS A SOFTWARE PROBLEM WITH THIS SPECIFIC TYPE VEHICLE AND THAT THE SOFTWARE THIS VEHICLE HAS IS A NEW SOFTWARE. WHEN I ASKED IF THIS ISSUE IS BEING WORKED BY THE SOFTWARE ENGINEERS FOR SOLUTION THE REP SAID HE HAS NO IDEA AND THAT I SHOULD TAKE THE VEHICLE BACK. THIS ISSUE IS A SAFETY PROBLEM ESPECIALLY WHEN SUDDENLY SURGES WITHOUT CONTROL, PARTICULARLY WHILE DRIVING IN A CITY CENTER A DRIVER CAN CAUSE AN ACCIDENT OR POTENTIALLY HIT A PERSON WHILE LOOSING CONTROL. GM COSTUMER ASSISTANT WAS CONTACTED, BUT THERE WAS NOT HELP AND GM REFUSES TO LET ME KNOW WHEN THE FIXES FOR THIS ISSUE WILL BE OUT. THEREFORE I HAVE REFUSE TO TAKE POSSESSION OF VEHICLE UNTIL IF FIXED CORRECTLY!! THIS ISSUE WILL AFFECT ALL 2016 AND UP COLORADO WITH DURAMAX ENGINE AND NEW SOFTWARE VERSION INSTALLED ON THEM.