Just bought a 97 3500 dually that originally had a 7.4 that was taken out I have a 5.7 out of a 98 or a 8.1 out of a 02 avalanche that I would like to put in it witch would be the easiest swap to the 5.7 or the 8.1
update i ordered a new ecm pcm programmed without the security and have that solved but i still have some wiring issues between the 96 cab harness and the 98 engine harness no tac or gauges but still working on it
Yes it has never communicated with the scan tool other than getting the codes with either harness or ignition the original ignition was broken out and you had to use a screwdriver to turn it on so I put in the new column and dash harness
I have a 97 3500 with a 5.7 vortec the ignition switch was destroyed when I got it so I put a column in out of a 98 half ton also put in the dash and dash harness but the truck still won't start unless you dump fuel in it will I have to send in the pcm to get the security deleted or is there...