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Need pin numbers for 98 yukon ECM

I have a 99 chevy silerado with a 4.3, and manual transmission. I took out the 4.3 and put in a 98 yukon 5.7 that had a automatic transmission. does my ecm have to be programmed. Do you know whare i can get the pin numbers on the ecm. A wire diagram just shows the color of wire going in the ecm, i need the pin numbers.

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You will have to go to the gm dealer and get the ecm program. You are playing with trouble, if you miss up once, your vehicle may not be able to run.

Posted on Nov 20, 2009

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