Well i finally figured out what was wrong with the 93 that i got, Bad ECM. I swapped the one in the truck with a know good working one, and sure enough, i got charging back, AC back and OD back. So now i am searching for a new or reman ECM but the sites that i look at have a few different options for a 93 ecm with an auto trans. Each one has a different OEM #. What is this OEM # and where can i find the OEM number so i get the right one, Thanks

 

P/N 5602 6858 1993, Man. Trans., w/o RFI
P/N 5602 6859 1993, Man. Trans., RFI
P/N 5602 6860 1993, Auto. Trans., w/o RFI
P/N 5602 6861 1993, Auto. Trans., RFI

I don't know what "RFI" is.

Hope this helps.


- > The part numbers may have been superseded.

 

Look for the part number on the back. It's under the clear epoxy printed on the board.

 

I just put a ecu on my 93,I got it on the web from a place called ecu direct.I was very happy with it,it is a rebuilt,but looks brand new,inside and out. They way it looks,they must replace every thing.I had one froma place called cardones,it never worked right,and I sent it back,and they gave me another one it lasted about six months.They had a lower price,I guess you get what you pay for

 

thanks for the help, i will have to look and see what the oem number is, should be on the ECM itself right? Thanks

 

Yes it is, on the backside.

 

I found the OEM number, it is B56029103, does this number look right, i have not been able to find a 9103, only a 9102. It was under the case, under the appoxy lower right hand side if you have the plug for the wiring harness facing you. Thanks

 

anyone got any suggestions, thanks

 

MY auto ecm is a 56029103 and my m/t is 56029101. a m/t ecm will not give you o/d on a a/t. hope this helps there may be many more # than we have.
Just looked on my truck and it has the 56026860, LOL!!!
TOMMY

 

Part number 56029103 was superceded by part number 4746568.

 

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