2003 Silverado 4.3 to 4.8 or 5.3 engine swap

[TDK08]

I guess the quick way to find out is to check your throttle body to see if it is DBW or DBC...

DBC will have two cables going to the throttle.

[ducky]

Are you sure im dbw because i read somewhere that all 4.3 v6s are dbc, even the newer ones. Also what do I have to do about the fuel lines and pump. Will the radiator in my truck work as well.
I can get a 5.3 V8 with 40 thousand to 50 thousand miles for 800 to 900 dollars and anything else i need off the truck is this a good price

I guess the quick way to find out is to check your throttle body to see if it is DBW or DBC...

DBC will have two cables going to the throttle.

What he said. Just pop your head and check. And as for fuel lines. I bought two foot long steel braided fuel lines from summit as well as two male fittings and two female fittings. I cut the ends off the stock fuel lines and put the fittings on and then attatched everything. Just make sure you dont cut the stock fuel lines too short. I almost did