03 silverado 4.3 to 5.3

[RedHeartbeat]

Sounds like a good deal to me

[jsisk]

Sounds like a good deal to me

will that year be ok in my 03 as long as i get the harness?And should i be alright with my fuel lines if i cut and use the fittings that are in the sticky on here

[Frenchy]

You can use any 01+ engine. The only difference in the actual engine between pre-03 and post-03 is the throttle body. And returnless or return fuel rails. Easy to swap either around.

[jsisk]

You can use any 01+ engine. The only difference in the actual engine between pre-03 and post-03 is the throttle body. And returnless or return fuel rails. Easy to swap either around.

Thanks Frenchy,how do i know if i have a return fuel set up?I have to lines that run into my spider injection but i seen on here it might be returnless.

[Frenchy]

Your trucks an 03? It's a return setup

[jsisk]

Your trucks an 03? It's a return setup

Thanks again lol ill stop being a pest now and get to work got my engine mounts in from dealer and new clutch kit and fly wheels