4.8 to 5.3 swap

[silverado120]

been debting wether or not to swap out my engine i have to 4.8 right now and i wanted to swap out to a 5.3 im pretty sure everything from mine will bolt on to the 5.3, but as far as the wireing harness would i need to get that with the engine i drive a 2006 silverado 4x4 cc and does it have to be a engine out of a 4x4 and also whats the best 5.3 lq4 etc and how can i tell them apart

[Botlfed]

4x4 or not doesnt matter just use the your motor mounts, also are you sure you dont have a 5.3??? i thought all z71 were 5.3s 5.3, 4.8 is stamped on the block behind the front accesories, an lq4 or lq9 there will be a 6.0 stamp on the block, one easy way to tell which one you have is what vehicle it came out of, also if you do have a 4.8 swapping to a 5.3 really isnt worth that hassle.

[silverado120]

ya its a 4.8 they guy i bought it from put the z71 sticker on there and changed the suspension ya i know its really not worth it but this summer gas is gunna be to much to have a 6.0

[Botlfed]

well it should be an easy swap everything is pretty much the same.

[silverado120]

thats why im gunna do it so should i get a engine out of a tahoe or something that has more power than just a plain old 5.3 and does it matter if its an lt or ls

[WARLOCK]

They are ALL the same....Unless you find an L33 but chances are ull just get an iron block

[silverado120]

what kinda of truck is the l33 im kinda new with all these different engines

[Botlfed]

THE L33 is a HIGH OUTPUT 5.3 jut google what they came in, an l33 is an aluminum block 5.3

[WARLOCK]

Alum block and flat top pistons.

[silverado120]

i though the 5.3 came with deep dish pistons or is that just on the iron block