MY SPEEDOMETER BEGAN ACTING ERRATICALLY, INDICATING 80 MPH WHEN SITTING AT A STOP LIGHT, STICKING WHILE ACCELERATING OR DECELERATING. SOMETIMES IT INDICATES 20 MPH WHEN I AM ON THE FREEWAY. I RESEARCHED THIS ON THE INTERNET AND DISCOVERED OVER 1,000 POSTS FROM CHEVROLET AND GMC OWNERS WITH THE SAME PROBLEM. APPARENTLY THERE IS AN EFFORT FROM OWNERS TO DEMAND A RECALL. I DIDN'T DISCOVER THIS UNTIL JUST AFTER I WAS INVOLVED IN AN ACCIDENT. I CHECKED MY SPEED AS I APPROACHED AN INTERSECTION AND THOUGHT I WAS GOING A SAFE SPEED (I WAS UNDER THE POSTED LIMIT). A CAR PULLED IN FRONT OF ME AND I COLLIDED WITH IT. EVEN THOUGH THE ACCIDENT WAS NOT MY FAULT, THE DAMAGE TO THE OTHER CAR WAS MORE THAN I EXPECTED THAN WOULD HAVE BEEN CAUSED AT MY INDICATED SPEED. I DIDN'T KNOW MY SPEEDOMETER WAS GOING BAD. *TR