SPEEDOMETER WILL SIT AT 0 MILES PER HOUR OR WILL BE 30 MILES PER HOUR LOWER. SPEEDOMETER WILL SIT BELOW 0 WHEN IDLE. WHEN I RESTART IT, IT MAY BE FINE OR GO BACK TO BELOW 0 TO VERY LOW MILES. I HAPPENS MORE WHEN WARMER AND RUNNING A WHILE. I SEE THAT IS A PROBLEM FOR MANY CHEVROLET TRAILBLAZERS.
2004
FUEL SYSTEM, GASOLINE
2004 CHEVROLET TRAILBLAZER LS 4.2 I6-SES LIGHT WENT OFF WHILE DRIVING. TOOK IT TO AUTOZONE AND THE SCANNER READ CODE P0455. HAD A MECHANIC LOOK AT IT AND HE FOUND A CRACK ON THE GAS TANK AT THE NECK WHERE IT CONNECTS TO THE FILLER NECK.THIS REPAIR RUNS INTO THE HUNDREDS OF DOLLARS WHICH I DO NOT HAVE. I HAVEN'T EVEN FINISHED PAYING OFF THE CAR YET. I RESEARCHED THE PROBLEM ONLINE AND HAVE FOUND QUITE A FEW TRAILBLAZER OWNERSWITH THE EXACT SAME PROBLEM. *TR