5SPD WONT HOLD TRUCK&TRAILER ON STEEP LAUNCH RAMP.PARKING BRAKE DISENGAGES.DEALERS DON'T KNOW HOW TO FIX RECURRING PROBLEM.I'VE ASKED FOR HAND BRAKE BUT THEY SAY THE CAN'T CONVERT FROM FOOT TO HAND BRAKE. HAD TRUCK FOR 10 YEARS AND THIS IS MY MAIN BUYER'S REMORSE. I'LL NEVER CONSIDER ANOTHER VEHICLE WITH A FOOT PARKING BRAKE AGAIN.CAB DID PAY SMALL VISIT TO THE DRINK DUE TO JUNKY PARKING BRAKE.THIS NEEDS TO BE RESOLVED ONCE AND FOR ALL.