MY 4WD GAVE IN AND BROKE THE FRONT AXLE AND SEIZED THE FRONT DIFF. THIS HAPPENED IN APRIL AND WAS REPAIRED BY GM. GM PAYED 40% OF THE COST TO REPAIR. THE TRUCK HAD 68000 MILES ON IT AT THE TIME. THE TRUCK NOW HAS 72000 MILES ON IT AND THE TRASMITTION NEEDS TO BE REPLACED. I GUESS THE SUNSHELL IS AT FAULT, BUT REGARDLESS, PRETTY MUCH THE WHOLE TRUCKS DRIVE TRAIN HAS NEEDED TO BE REPLACED BEFORE 75000 MILES. THIS SHOULDN'T BE THE CASE AND MAKES ME WONDER IF THIS VEHICLE IS A LEMON. *NM