1992 k2500 pcm

[chevyman98]

I think I may have a bad pcm looking to goto pick a part and get one to verify my problem. What years can I pull it from.
Its a 1992 k2500 6lug. 350 with a 700r4. I have a picture of my pcm with the numbers on it so I can match em up if needed.

 

[kkirwan71]

I want to say anything older than 94


Sent my 3/4 ton iPhone

 

[grampadirt]

Be sure to get one with the same PROM as well.

 

[someotherguy]

I'd troubleshoot a different direction first. ECM's on these trucks very rarely go bad. And I mean VERY rarely. Finding the exact right one is gonna be a challenge; your cutoff year is '92 because in '93 they went to a PCM to control the 4L60E trans.

Richard

 

[chevyman98]

I've done just about everything on my 92 except distributor and knock sensor. It has a jet chip in it so I was kind of leaning towards a bad chip making it run like crap, wont idle then sometimes when it does it idles around 1500rpm.

 

[chevyman98]

Only thing I need to do is pin out my knock sensor wire.
Can anyone tell me where it goes to the pcm? Looks like a green wire. If it has continuity I may replace the knock sensor if that still dont help I'd like to goto pick a part and try to find a comparable pcm to test if thats the problem.
Being my truck is a ******* k2500 6lug should I get a pcm from a 1/2 ton 4x4 700r4 truck preferably the same year

 

[chevyman98]

Is there a way too test the knock sensor. Do yall have a pin location so I can check for a break in the wire from knock sensor to pcm

 

[Johnbalderas90k1500]

As long as the ecm numbers match it doesn't matter. Your prom chip is what tells you computer the information on engine size, gear ratio etc.

 

[chevyman98]

Thanks