NHTSA Complaint #10207979 — 2002 CHEVROLET TRAILBLAZER

AT ABOUT 40,000 MILES IT STARTED MAKING A LOUD ROARING NOISE AT START UP UNTIL YOU GET ABOUT A MILE DOWN THE ROAD. I CHANGED THE PLUGS AND AIR FILTER AT 60,000 AND THE NOISE SEEMED TO GO AWAY. IT WAS SOON REPLACED WITH A SQUEAKING NOISE FROM THE BELT AREA. I TOOK IT IN TO HAVE THE BELT REPLACED AND $90 LATER THAT DIDN'T FIX THE SQUEAKING NOISE. AFTER A LITTLE RESEARCH ON THE WEB I FOUND OUT ABOUT THE FAN CLUTCH PROBLEM AND THE WATER PUMP BEARINGS WERE GOING BAD. SO I REPLACED THE FAN CLUTCH AND THE WATER PUMP MYSELF FOR $300. THE ROAR IS NOT AS BAD NOW BUT STILL THERE, SHIFTS ABNORMALLY, AND NOW AT 60 MPH IT JERKS FORWARD AND RPMS GO FROM 1500 TO 2000. I RESEARCHED MORE ON WEB AND FOUND THAT AFTER CHANGING THE FAN ASSEMBLY YOU MUST GET THE PCM UPDATED. I CALLED THE LOCAL DEALER (MAROONE) AND THEY WANT $104 TO DO THAT. ANY INFORMATION WOULD BE GREATLY APPRECIATED. *TR