NHTSA Complaint #10051363 — 1996 GMC Z-71

I HAVE A 1996 GMC 1/2 TON PICK UP Z71. I AM IN THE PROCESS OF REPLACING THE TRANSMISSION FOR THE 2ND TIME. I MADE SEVERAL COMPLAINTS ON THE FIRST TRANNY, WHILE STILL UNDER WARRANTY AT ELHART GMC IN HOLLAND, MI. THEY KEPT TELLING ME THERE WAS NOTHING WRONG. AT 60K TRANNY WAS TOAST. I PAID $2000 FOR A NEW TRANNY WITH A 3 YEAR/50K WARRANTY. JUST SHORT OF 3 YEARS, BUT ONLY 29K MILES LATER 2ND TRANNY FAILED. AT ELHART (FOR THE LAST TIME) THEY PUT FLUID IN IT, AND TOLD ME THERE WAS NOTHING WRONG WITH TRANNY. NOW AT GOOD GMC IN GRAND RAPIDS, MI THEY ARE REPLACING TRANNY. MY MAIN ISSUE IS THEY TELL ME THAT THIS NEW TRANNY WILL ONLY HAVE A 12 MONTH/ 12K MILE WARRANTY. THIS IS NOT ACCEPTABLE!! PLEASE HELP!!