I need some help, I never had a problem with my blazer then all the sudden it wouldnt shift into 3-4, it just acts like it went into neutral. I started by changing the 3-4 solenoid in the trans, didnt help anything. Then I figured it was just a bad trans so I bought a GM goodwrench trans, put it all in with new stuff. Once again didnt help a thing. So then I figured what else could it be, so I changed the ECM for good measure, still the same problem. I just dont know what else it could be.

 

any cel codes?

 

It had one but thats just because I straight piped the cat a long time ago.

 

There would be more help if you would have posted this in the correct section.

 

I just created my account, where would it be good for me to post it?

 

Here

Either click that link or scroll down under the sub-section "General" and under that section, go to Engine/Transmission...

 

*Moved to 'Engine and Transmission'*

 

Thanks