Mechanics

CHEVROLET EXPRESS REBUILT PROBLEM

1999 Chevrolet Express • 66,000 miles

The ecm on this van is fried. If I get a used ecm with the same service number four letter code number etc. Will it work without anything done to it?
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Rsfriese
March 2, 2013.



No, it needs to be flashed. It may or may not take the flash as it is set up for another vehicle.

I would replace it with a new one and get it flashed

if the old one fried, as you say, make sure you find the reason or you will fry the replacement as well.

Roy

I took the original ecm apart and found the seal leaked. Found a resistor totally gone. So a used one is out of the question. Have to purchase a rebuilt ecm programmed for my vehicle. Thank you! You saved me extra money buying a used ecm that wont work.

Tiny
Rsfriese
Mar 2, 2013.
Good luck

Roy