<DIV id=post_message_3974049>I have been having an ongoing problem with this car, 2000 GM 83k.As your driving along, usually around 35mph and when you are light on the pedal and start to give it some gas, or sometimes when just starting out from a light it will suddenly hesitate and then go. it is random, doesn't always happen.When it doesthe traction control light will now come on and the OD light on the dash goes out. After replacing the spark plugs, fuel filter, air filter, pcv, fuel pressure regulater, fuel pump, TPS &amp; a trnas flush. I gave up and to it to the dealership for their 'expert diagnosis. The replaced #1 coil and cleaned the egr ports &amp; updated the PCM.($500 later!) It did fix the steady misfire, but not the problem noted above. I took it back the next day, they retested it for NC and said there was no misfire, it felt likeit needed transmission service.I don't want to take it back there again I think they are guessing as much as I am! Any ideas?</DIV>