my service engine soon light flashes on for a few seconds and goes off. it comes on when i stop but when i gas on it it'll go off. dtc 57 reads pcm 5 volt shorted. im thinking its something to do with the tourqe converter but im really not sure. i have no power lose so for but it has staldded out b4. can anyone give me some help with this. 94 chevy 6.5 1500 its got 154000

 

check and clean the grounds they play big part with these trucks

The computer ground are at the back right of the intake should be 2 or 3 wires and right under the A/C Dryer on the firewall their are 2 ground straps one goes to back of the head and the other goes to the frame check good and clean their is PMD ground on top of the IP and a ground from right battery to the fender

Also check your ECM fuses