I HAVE HAD MY 2014 GMC ACADIA DENALI FOR A LITTLE OVER 6 MONTHS. SINCE THAT TIME I HAVE DRIVEN A SIGNIFICANT NUMBER OF MILES. A FEW MONTHS AGO I STARTED HAVE NECK PAIN AND I COULD NOT ADJUST THE SEAT HEAD REST TO A COMFORTABLE STATE. ON NOVEMBER 14TH 2014, I HAD AN ER VISIT AFTER THE NERVE PAIN IN MY ARM WAS SO SEVERE I COULD NOT STAND IT. ON DECEMBER 22ND 2014 I HAD TO HAVE SURGERY FOR A HERNIATED DISC BELOW MY C6 VERTEBRA. BECAUSE IT WAS CAUSING NERVE PAIN IN MY ARM AND LOSS OF STRENGTH. I HAVE SEEN OTHER COMPLAINS ONLINE WITH THESE NECK RESTS AND COMPLAINTS OF INJURY IN THE GMC ACADIA VEHICLES. I HAVE CONTACTED MY GMC DEALER AND GMC CUSTOMER COMPLAINTS AND THERE IS NO SOLUTION. THE PROBLEM, IS THE HEAD REST COME TOO FAR FORWARD AND DO NOT LOCK IN PLACE. THEY CAN BE PUSHED FORWARD AND BACK WITHOUT DEPRESSING THE BUTTON. ALSO THE HEAD REST TO NOT ADJUST UP WITH ENOUGH HEIGHT SO I CAN NOT ADJUST THE HEAD REST UP ENOUGH FOR MY 6' 3" HEIGHT. I WISH GM WOULD TAKE THIS PROBLEM SERIOUSLY. *TR