I need a wiring diagram. I swapped out a 4.3 for a 98 5.7 vortec
I have a 99 silverado with a 4.3, manual trans. I bought a 98 5.7 that came out of a 98 Yukon. I'm having problems knowing what wires I need to keep and the ones I don't. I have the wiring harness from the 5.7 on the motor,and the 4.3 harness on the truck. I don't know what wires from the 5.7 harness I need through the firewall,since the plugs are different. Gauges,ignition wires, fuel gage. Some of the pins in the ECM are different color wires or that pin position does not even have a pin in it. It would be nice to have a diagram of the ECM also. can anyone help me please?
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If there both 4.3's the interchange says the will fit but I have found that you need to look everything over well. I have found that some have knock sensors with different sizes (2 wire and 1 wire) and the oil pan and pump sometimes have to be swapped going from 2wd to a 4wd. Sit them side by side and check everything is my best advice.
Hi :) Check the wiring harness for a fuel pump relay that is on the firewall. The trans is computer controlled (shift points, firmness, ect). You would either need to run a TBI motor from a '92-95 3-4 or 1-ton truck and get the computer to go with it. Then the new gas computer can run the trans. You will also need to swap the torque converter to a gas unit instead of the diesel. OR get whatever motor you want, and then use a stand-alone controller for the trans. They cost about $600+ for the controller. Still need to do the torque converter. You could run the diesel TC but it just wouldn't perform to full potential.It will bolt up, but a diesel transmission is different from a gas transmission. Diesels shift way earlier and only go to 3500 rpm max. If yo u do the engine swap, you will need a new valve body in the transmission. I have a 700R4 in a 1935 Ford truck. It never shifted right unless I drove it manually. It always bogged down. I took the transmission to 5 different shops and no one could figure it out. After 6 years, I was telling a buddy about it and he had me bring it to his shop. He changed the valve body (was a diesel trans and I didn't know when I bought it at an auto swap) to a corvette valve body and now the truck runs great.
trywww.autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you
Yes, but if you don't have a really good diagram for both, you will need to identify each function by trial & error, then remove wires in harness and put them in the right places in the harness plug Use original plug from old seat on new seat.Don't change anything in body harness.