Just replaced my PCM in 2005 cobalt ss . It has the stage 2 pulleys (slandered GM stage 2 kit ) .

It was a used PCM so there is no tune on it and has the check engine light to re-learn the crank sensor (which is obvious) but Will that hurt anything or be a problem ? It also seems like my fuel gauge is backwards . The more I drive the more my amount of fuel goes up , Unless its adapting to the new PCM I dont think its making gas as I drive haha .
And when I got it back the Power Steering was gone And the pump was replaced a year ago from GM on warrenty What could be the problem there ,Surly its not the pump all ready !

 

U must have got a PCM from a 06 or 07 cobalt u need to have one from an 05 for everything to work right

 

Yes it is from a 2006 I ment to correct myself but i've been playing ball all weekend , Do you think it would have effect on the power steering since its electric power steering ? I also get no message on the screen about power steering ..

 

It's possible I really never ran a PCM from a different year for more then a few minutes and that's how I saw the gauge issues

 

Well I got it back friday and GM's electronic guy was away an its a long weekend I have my appointment for tuesday , Is the GM stage 2 tune any good ? whats the specs of the tune i've looked around but cant find anything about it

 

gm stage 2 tune is very fine. 05 car must have an 05 pcm

 

Well I bought the car used and for whatever reason it had a 06 PCM in it and thats what the mechanic ordered . Works fine besides the fuel gauge is backwards .
And now get to fix my power steering Starting to dislike GM lol