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Old 03-13-2017, 12:06 PM   #1
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Join Date: Mar 2016
Location: Pennsylvania
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Ecotech to 3400 swap

Ok, so I have an 02 alero 2.2 5speed that I swapped an 03 3400 into with a 5speed from a 91 z24 cavalier. I'm just about finished with the entire swap at this point. I just turned the key to make sure that the car would crank and I got nothing. I only replaced the pcm and engine wiring harness. I have read in a few posts about swapping from a 2.4 to 3400 that it might have been easier to swap the wiring for the whole car because of issues like this, headlights not working etc. the only issue I seem to be having is the no crank. I have also read that the bcm needs to be changed as well because the vins need to match. I did not change mine and the donor car is long gone. If this is my problem can my bcm be reprogrammed or do I need one from a same year 3400 car and would that need to be reprogrammed to match the vin? Could this whole problem be a pass lock issue? One other thing that I noticed is that there are no pins in the fuse block where the starter relay goes. The car ran without this with the 2.2, am I missing something? Any help would be greatly appreciated, thank you
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