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Does anybody know if an 04.5 ecm will work in my 05? Both trucks are identical, automatics, everything.
 

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I tried it the other day. Truck fired right up but had no throttle. Im guessing since the 04.5 has the mechanical apps while the 05 is electronic. I did not have the ecm reflashed. So maybe refalshing it would help solve the issue, but not 100% sure
 

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Correct the 04.5 is a mechanical APPS. I think the 05 MAY have been a split year for this, but am not 100% sure. More than likely it will need to be reflashed.
 
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