NHTSA Complaint #10138075 — 2003 CHEVROLET TRAILBLAZER

I HAVE A 03 TB 2WD I HAVE NOTICED RECENTLY THAT IT IS NOT CHANGING GEARS PROPERLY. THE SERVICE ENGINE LIGHT CAME ON AND THE PROBLEM APPEARED THREE MORE TIMES. THEN THE LIGHT WENT OFF AND THE PROBLEM WENT AWAY. I TOOK IT TO THE DEALER AND THEY HOOKED IT UP TO THE "MACHINE" AND ALL THEY COULD FIND WRONG WAS MY O2 SENSOR. THEY SAID I NEEDED TO REPLACE THE GAS SENSOR. THIS HAS NOTHING TO DO WITH THE TRANSMISSION.(THIS IS WHAT THEY SAID) THEY TOLD ME THAT THEY WERE NOT WORRIED ABOUT IT. I TOLD THEM I WAS ABOUT TO DRIVE THE CAR ON A TRIP 1,000 MILES ONE WAY. NO PROBLEMS THEY SAID. I CALLED AND QUESTIONED THE DEALERSHIP AND HE ACTED VERY SURPRISED BY THIS. SAYS HE HASN'T SEEN A "PROBLEM" WITH THE TRANSMISSION. ONE OF MY CO-WORKERS DAUGHTER ALSO HAS A TRAILBLAZER AND HERS HAS STARTED TO ACT UP AS WELL, AND GUESS WHAT IT IS THE SAME THING AS MINE. I WENT ON THIS WEB SITE AND FOUND OUT THAT THIS IS A COMMON PROBLEM WITH THE TB. IS THERE ANYTHING THAT CAN BE DONE ABOUT THIS MADNESS? HTTP://TOWNHALL-TALK.EDMUNDS.COM/DIRECT/VIEW/.EF15323/65. *NM