2005 Chevrolet Trailblazer vehicle speed control problems

“SPEEDOMETER FIRST SHOWED SPEED OF 60 WHEN SITTING STILL. I TURNED OFF THE ENGINE, RESTARTING IT 3 TIMES AND THE SPEEDOMETER RESET. BUT A FEW DAYS LATER IT ONCE AGAIN STUCK AND I HAD JUST STARTED IT. THIS TIME AT 48 AT ALL TIMES WHETHER THE ENGINE IS ON OR OFF, IDLING OF TRAVELING. IT CONTINUES TO BE STUCK AT 48 AT ALL TIMES, NEVER DECREASING OR INCREASING.”

“DRIVING IN CITY SPEEDOMOTER QUIT WORKING PROPERLY. DONT KNOW WHAT SPEED IS WHILE DRIVING CAR HAS 33000 MILES, HAS NOT BEEN DRIVEN IN 3 YEARS AS IT WAS MY FATHERS AND HE NO LONGER DRIVES AS HE IS 97 YEARS OLD”

“AS OF 2011 (WHILE DRIVING ON FREEWAYS IN MULTIPLE OCCASIONS) I'VE BEEN HAVING ELECTRICAL ISSUES SUCH AS MY FUEL LEVEL GAGE WOULD READ FULL AND VEHICLE WOULD SHUT OFF CAUSE NO GAS IN TANK, AIR BAGS SENSOR WOULD SHOW IT ON WHEN NO ONE IS SITTING IN THE PASSENGER SEAT, AND THERE ARE SOME ELECTRICAL ISSUES ON DRIVER SEAT CONTROLS NOT WORKING, DASH BOARD GAGES NOT SHOWING READINGS WHILE VEHICLE IS IN MOTION (RMP, SPEEDOMETER, OIL, GAS).”

“THE SPEEDOMETER HAS BECOME UNRELIABLE; IT STICKS / JERKS WHILE DRIVING AFTER WHICH IT DOES NOT DISPLAY AN ACCURATE SPEED. I'VE HAD MY SPEEDOMETER READ 30MPH WHILE COMPLETELY STOPPED. IT HAS A GREATER TENDENCY TO STICK AROUND 50-60MPH. REPEATEDLY STARTING THE ENGINE, CAUSING THE SPEEDOMETER TO GO THROUGH ITS RESET CYCLE WILL MOVE THE NEEDLE BACK TO 0MPH IN APPROXIMATELY 5MPH INCREMENTS FOR EVERY START. THIS ONLY PROVIDES A BIT OF RELIABILITY FOR SHORT TRIPS.”

“TL* THE CONTACT OWNS A 2005 CHEVROLET TRAILBLAZER EXT 370. THE CONTACT STATED THAT WHILE DRIVING AT 60 MPH, THE VEHICLE FAILED TO ACCELERATE WHEN THE ACCELERATOR PEDAL WAS DEPRESSED. THE FAILURE OCCURRED ONCE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE THROTTLE BODY HAD FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 190,000.”

“FIRST MY REAR WIPER AND REAR WASHER STOPPED WORKING BUT WHEN YOU TURN THE BUTTON IT SOUNDS LIKE IT WANTS TO GO. SECOND MY SPEEDOMETER IS ALL OVER THE BOARD. SOMETIMES IT RUNS LOW, SOMETIMES IT'S HIGHER AND AT TIMES IT JUST WON'T MOVE. IT HAS ALSO BEEN OFF THE BOARD POINTER DOWN AT THE PRND321. THIRD MY OIL GAUGE STOPPED WORKING.”