2013 GMC SIERRA Seats Problems

THE HEAD RESTS OF OUR NEW TRUCK (PURCHASED DEC 2012) PROJECT SO FAR FORWARD THAT IT FORCES MY HEAD TO TILT DOWNWARD. THERE IS NO FORWARD/BACK ADJUSTMENT TO THE HEAD REST, AND TURNING THE HEAD REST BACKWARDS TO MAKE IT BEARABLE MEANS IT NO LONGER WILL SERVE WELL TO PREVENT NECK INJURIES IN A CRASH. FOR SHORTER DRIVES, THE FORCED HEAD TILT IS UNCOMFORTABLE, BUT FOR LONGER DRIVES IT CAUSES ENOUGH PAIN THAT I HAD TO SEE A CHIROPRACTOR (AND I'M AN ATHLETIC, HEALTHY PERSON!). THE DEALER AND MANUFACTURER CONTEND IT WORKS AS DESIGNED FOR SAFETY IN A CRASH. BUT IF I CAN'T SIT IN IT FOR NORMAL DRIVING WITHOUT EXPERIENCING NECK/BACK PAIN, HOW "SAFE" IS THAT? I NOTICED THE NEW 2014 GMC 1/2-TON PICKUPS HAVE A HEAD REST WITH A NOTICEABLY LESS ANGULAR DESIGN, INDICATING GMC RECOGNIZED THE HEAD REST DESIGN IN MY 2013 3/4-TON TRUCK IS, AT BEST,...