blazer upshift problem

[countrybogger94]

i have a 2000 s10 blazer and if im not holding the gas about 3/4 the way down it will hesitate before going into 2nd and 3rd gear. still goes into reverse, 1st and 4th without a problem. heard it might be the 2-3 shift solenoid in the trans. anybody know about these?

[Jjay78]

how long's it been since your last filter and flush?

[countrybogger94]

ive only had it since september and i havent had one done yet so im not sure if the previous owner had it done or not

[randycrane79]

can you manually shift it ? sounds like its dirty and need a flush prob a sticky valve

[countrybogger94]

yep manually shifts fine. and only hesitates occasionally

[Eroq]

Check engine light on?   Transmissions main input is the throttle position sensor... my 01 sonoma will act up occasionally and it always throws a code for the TPS.

[countrybogger94]

it was on before but only O2 sensor codes came up on the scanner nothing about the trans on it