NHTSA Complaint #10129025 — 2003 CHEVROLET SILVERADO

I OWN A 2003 CHEVROLET SILVERADO EXTENDED CAB SHORT BOX Z71 4X4 PICK UP TRUCK. IT HAS THE 4 SPEED AUTOMATIC WITH OVERDRIVE TRANSMISSION. I HAVE A CONSISTANT SHIFTING DRIVELINE CLUNK THAT ONLY OCCURS WHEN THE TRANSMISSION UPSHIFTS FROM 2ND TO 3RD GEAR AND THEN DOWNSHIFTS FROM 3RD TO 2ND GEAR. I HAVE HAD THIS VEHICLE BACK TO THE CHEVROLET DEALER THREE TIMES SO FAR CONCERNING THIS ISSUE. ALL I GET IS THE USUAL GM RUNAROUND THAT THIS PROBLEM IS A NORMAL CONDITION AND NO REPAIRS SHOULD BE ATTEMPTED ACCORDING TO THE TSB RELATED TO THIS CONDITION. I HAVE OWNED OTHER GM VEHICLES IN THE PAST, AND I HAVE NEVER HAD OF ANY OF THEM BANG OR CLUNK FROM THE TRANSMISSION WHEN SHIFTING GEARS AUTOMATICALLY. THEY CLAIM THAT IT IS SOME TYPE OF A MOMENTARY TORQUE REVERSAL PROBLEM WHEN THAT PARTICULAR SHIFT OCCURS THAT CAUSES THE CLUNKING AND OR BANGING CONDITION IN THEIR TRANSMISSION. A MOMENTARY TORQUE REVERSAL IN THEIR DRIVETRAIN WHILE THE VEHICLE IS MOVING IN FORWARD GEARS IS A NORMAL CONDITION? NOT TO ME. THEY ABSOLUTELY WILL NOT FIX THIS PROBLEM UNDER WARRANTY STATING THAT IT IS A NORMAL CONDITION. ON THE OTHER HAND, IF THIS CAUSES THE TRANSMISSION TO SUDDENLY LOCK UP...AND SOMEONE GETS HURT IN THE PROCESS....THEN I'M SURE THAT IT WILL BE FIXED PROPERLY. WHY IS IT THAT THE AUTOMOTIVE MANUFACTURERS TODAY WILL NOT REPAIR THEIR ENGINEERED SCREWUPS AT THEIR EXPENSE, LIKE THEY SHOULD BE RESPONSIBLE TO DO? WHY IS IT THAT THEY WILL NOT FIX THEIR PROBLEMS UNLESS THAT COMPONET IN QUESTION FAILS COMPLETELY?