THE SPEEDOMETER WOULD ALL OF THE SUDDEN JUST GO DOWN TO ZERO. ONCE YOU WOULD STOP CAR, TURN OFF AND THEN BACK ON, IT WOULD RESET. IT DID THIS A HALF A DOZEN TIMES, UNTIL THIS PAST WEEKEND, WHILE DRIVING, IT SAID I WAS GOING 70, BUT I SEEMED TO BE PASSING EVERYONE. I SLOWED DOWN, AND NOTICED THAT THE SPEEDOMETER WAS STUCK AT 70. I STOPPED, TURNED OFF THE CAR AND NOTHING HAPPENED. I HAD TO CONTINUE MY TRIP BY PACING MYSELF WITH OTHER CARS. YESTERDAY, IT SAID I WAS PEGGED OUT GOING OVER 120. IT WOULD NEVER GO BELOW 70. I TOOK TO DEALER AND THEY HAD TO SEND CLUSTER TO BE REPAIRED. THIS IS A VERY DANGEROUS SITUATION AND SOUNDS LIKE A RECURRING PROBLEM THAT NEEDS TO BE ADDRESSED BY GM. I DON'T THINK THE CONSUMER SHOULD BE STUCK PAYING FOR A SAFETY ISSUE THAT GM NEEDS TO REPLACE. *JB