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Originally Posted by 1972C10
I have a computer out of an 89 c1500 with a 305 and th375 Im aiming to put that fuel injection setup on an 85 with a 350-th400 The computer is giving me a prom chip or computer code
I would like to replace it with one that will control the th-375-400 and is for a 3/4 ton with 350 is possible
Or anything that would be comparable
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The trans are not electric on that model year...The last 4 #s on the ecm are 7747... I have several of them...for auto trucks...$35 shipped.
You just have a bad ecm...very common problem,What is the code you are getting? I will help you figure this out...Thanks,Erick