I have a 97 Blazer that i think is giving me the P0785 Shift Timing Solenoid code and i've changed the Solenoids, Ignition switch, Trans filter so now i'm going to change the PCM and just wondering what years etc. will interchange as i no 98 is different. Any help would be great Thanks

 

96-97. You can make a 98 thru mid-02 PCM work if you get it reprogrammed.

Make sure the RPO codes match as much as possible.

 

Thanks Swart maybe i should have specified S10 Blazer? if that makes a difference not to sure and the computer that i picked up from a 98 has only 4 connectors and my 97 has 5 (small middle connector not on the 98.

 

Ah yes, Sorry. No difference in the S10 considering that there is no S10 moniker on the s-series blazer after '94. I just did not remember the connector differences. One could rewire if they were interested enough, but suffice to say that you should stick with the 96-97 PCMs.