1993 GMC SIERRA Tires Problems

#1 TRANSMISSION. SLIPS OUT OF GEAR INTO NUETRAL WHILE DRIVING AT HIGHWAY SPEEDS. MUST COAST OVER TO SIDE OF ROAD, TURN OFF ENGINE, WAIT, RESTART AND CONTINUE ON. NARROWLY CAUSED A COLLISION WITH A SEMI TRUCK WHILE COASTING TO SIDE OF ROAD. COMPLAINED TO DEALER NUMEROUS TIMES, SAID THEY COULD NOT FIND ANYTHING WRONG. NOW TRANS IS LOCKED IN 2ND GEAR AND WON'T SHIFT TO A HIGHER GEAR. #2 PAINT. STARTED CHIPPING WITHIN 6 MONTHS OLD AND LESS THAN 2500 MILES. DEALERS SAID NOTHING COULD BE DONE. ROOF IS NOW RUSTED THROUGH AND HEADLINER IS HANGING DOWN. DEALER AND ZONE REP SAY GMC IS NOT RESPONSIBLE AND REFUSE TO REPAIR AND REPAINT. #3 SEAT BELT RETRACTOR. DRIVER'S SEAT BELT WILL NOT RETRACT AND IS VERY LOOSE. IT WOULD NOT PREVENT INJURY OR DEATH IF INVOLVED IN A CRASH. DEALER AND ZONE REP DENY RESPONSIBILITY AND REFUSE TO REPAIR EXCEPT AT...

TIRE DEVELOPED A LARGE EGG SHAPED BUBBLE ON RIGHT, OUTSIDE HALF OF TREAD AREA. NOT ON SIDEWALL BUT DIRECTLY ON THE THREAD. THE VEHICLE STARTED TO ROCK VIOLENTLY FROM SIDE TO SIDE CAUSING THE RIGHT FRONT END TO DIP AND RISE RAPIDLY. I STOPPED IMMEDIATELY AND OBSERVED THIS BUBBLE. I DROVE THE REST OF THE WAY HOME, APPROXIMATELY 2 MILES. AT 10 MPH. WHEN I ARIVED HOME THE TIRE THEN DEFLATED BUT IT DID NOT BURST. THE TIRE IS FLAT BUT INTACT. IS THIS A TIRE YOU WOULD BE INTERESTED IN TESTING OR CHECKING OUT? PLEASE ADVISE. I CAN SEE FROM MY EXPERIENCE HOW THE CAR COULD OVER TURN DUE TO THIS INCREASING VIOLENT RISING AND DIPPING OF THE FRONT END. IF THIS OCCURRED ON A DIP AND THE BRAKES WERE APPLIED I BELIEVE IT WOULD CAUSE THE VEHICLE TO ROLL OVER VERY QUICKLY. THANKS JOHN. *AK