WE PURCHASED A 2003 GMC YUKON. BEFORE IT HAD REACHED 3000 MILES THE NEUTRAL LIGHT CAME ON ON THE 4X4 UNIT. FROM THERE IT WOULD SHIFT ITSELF INTO 4 LOW. WE HAVE HAD IT INTO THE DEALER A TOTAL OF 6 TIMES NOW AND THEY HAVE REPLACED ONE OF THE COMPONENTS 3 TIMES, TWO OF THE OTHER COMPONENTS ONCE. AFTER THE SECON D REPLACEMENT IT STARTED SHOWING NEUTRAL AGAIN ON THE 4X4 UNIT. IT SEEMS AS THOUGH THE PROBLEMS DO NOT ARISE UNTIL AFTER 1000 MILES. THE DEALERSHIP SERVICE DEPARTMENT TOLD ME THAT THEY HAVE HAD A LOT OF PROBLEMS WITH THESE UNITS. WE ARE TRYING TO DO A BUY BACK BUT GM IS DRAGGING THINGS OUT AND GIVING US A HARD TIME.*AK