1995 GMC 2500 350tpi, thinking about electric fan just for more room and better mileage...I have a good junk yard here and can pull from there but which one do I use? Believe my alternator is stock so may have to upgrade that?
Do I have to reprogram ECU or can I just wire it thru a relay and temp switch with proper fuse size. If dual fans one thru coolant switch both thru a/c switch?
Seen a few '95 pickups doing it on youtube,,,is it the same? Don't want to buy a new system want to go junk yard route...thanks in advance!

1995 G2500 350tpi
16" wheels 245/70/16
KYB mono max all 4
Airlift rear