2006 4.3 to 5.3 Swap

[Frenchy]

That's why Im doing it at work, parts department right there, enough knowledge (at least I hope so.) to make it easy. I'm 99% sure I've got all the parts gathered save for the DBW stuff, and it's on its way. Just need the balls to jump into it and do it, having a hard time the truck hasn't even broke 40000 miles yet. Gotta get pictures of my motor too, looks nice dressed up in Chevy Orange and some polishing.

[jonathan734]

Will the flywheel and clutch off of my 4.3l work with my 5.3l lm7 or do I need to get v8 ones? If so where is a good place?

[Frenchy]

Gotta get V8 (4.8) flywheel and clutch, Centerforce supposedly makes a nice setup. I'm just going OE for now as I plan on going T-56 down the road, and then I have to get a car-specific flywheel and clutch again

[zebra]

Will the flywheel and clutch off of my 4.3l work with my 5.3l lm7 or do I need to get v8 ones? If so where is a good place?

+1 on the 4.8 flywheel. i got my clutch from clutchcityonline dot com. so far it's holding up fine - definitely grips a lot better than the 4.3 setup. i ain't had a chance to really let it rip yet, so i can't comment on that yet.

here's a disc comparison from my build thread...

[mike5.3]

I got a question, My truck is a 05 with the 4.3, Im going to drop in a 02 5.3 with the DBC harness. Will the wiring be a straight swap with my auto tranny and pcm (which will be tuned for the swap)

Or will I have to have a custom harness of some sort?

[zebra]

they used the same transmission, so i'd reckon it'll work... i don't know about the DBC swap - that'll have to come from the OP or somebody

edit... come to think of it, i think there might've been a difference with the PCMs - the 02 used red/blue connectors while the 05 used blue/green ones. i ain't sure what kind of bearing that would have on the connectivity of the two, but it's something to note

[mike5.3]

Yeah I was wanting to stay DBC, since my truck is already there. So i see it being easy (er) to swap in a lil older motor.

If its just a matter of a plug or two swaping on the harness I can do that. guess Ill find out for sure

[zebra]

i think if you just get a matching DBC intake/TB, it should work fine... i think. you'd have to also make sure the fuel rail style will also work

[Frenchy]

Uhm no it's much easier to swap to DBW, the 05 bcm does not play nice with DBC, Chick tried it (04redwt?) and I looked into it a lot, scoured over wiring diagrams, a few gm techs I worked with tried to find a way to make it work. Trust me DBW is easier

[RedHeartbeat]

The guys at street and performance know how to make a cable TB work in a DBW setup.