I've tried the search bar and trusty google to no avail. it seems no one has the question i have about the ecms. i had the opportunity to parts rob a 99 blazer yesterday and looking at the ecm in hers realized it has the functional tests and probably a little bit different fuel management and transmission controls. so i was wondering would it work in my 96?

Everything i find online leads me to believe it wont. but you guys would probably know for sure.

the functional tests in question are the injector balance and cam/crank correlation. my 96 has neither and they would be nice in the diagnosis of my misfire ( currently working with a knowledgeable GM tech from the local dealer) and i didnt know if a mpg or 2 would come out of the swap

 

Bumps

 

I doubt it

 

Definitely would need to be flashed to your vehicle for the correct powertrain strategy, IF the flash works. Cam /crank correlation is also referred to as "camshaft retard". You might have to look around in the scan tool to find it. 1996 through 2005 all have EDI, which uses a camshaft and crankshaft position sensor. P1345 basically means the cam sensor is off by more than ~27 degrees. Camshaft retard adjustment aligns the camshaft position sensor with the camshaft, hence the name Injector balance should be on both PCM's, but it might be referred to as "cylinder contribution test" on the 1996.