Official NBS 4.3v6 to GEN 3 V8 swap Guide

[ducky]

Mine was $50 bucks, easy to find

[RedHeartbeat]

I wonder if your truck was a Mexican import. A lot of the left over junk get put into the ones they intend to stay in Mexico. You also may just have one of the very first NBS V6 trucks imported into the US that they put the old leftovers into.

[GasGuzzler]

Ummm....was it a V6? Then it had the 4-connector PCM like all the rest of the 1999's I rememeber.

[zebra]

I wonder if your truck was a Mexican import. A lot of the left over junk get put into the ones they intend to stay in Mexico. You also may just have one of the very first NBS V6 trucks imported into the US that they put the old leftovers into.

mexican??... really?? actually - i do remember seeing something about some 99 NBSs getting Vortec 5.7s down there. i actually considered doing that swap myself, but i'd've had to find a 99 or 00 OBS to pull it out of.

actually, my truck is definitely American & was was built in the last half of the 99 run - february actually. i know it's American from the VIN. 1GTEK14W2XZxxxxxx
1=made in the USA, Z=assembled in Fremont, CA

Ummm....was it a V6? Then it had the 4-connector PCM like all the rest of the 1999's I rememeber.

yeppers... that's why it's in this thread

ps - that's the W in the VIN... but of course you know that

[GasGuzzler]

Yeah but I didn't take the time to read the other seven pages over again.

[zebra]

just a little tidbit of info...

found out today that (at least for 01 model 4.8/5.3) the 4l60 flexplate bolts & nv3500 flywheel bolts are, in fact, the same. they're also $3.xx each if you're unfortunate enough to have to buy new ones

[rmagni]

I have a 2008 Silverado regular cab short bed 4x2 3.23 rear gear with v6 auto I want to swap to a v8 my 08 is apparently different from the earlier models no one can reprogram the ecm/tcm no cai nothing for it. Even though it runs smooth it lacks power what year ls motor should I look for I want to keep my cruise and a/c my truck came with an electric fan are there wiring provisions for it to be run by the stock ecm/tcm thanks for any/all help

[Frenchy]

Go to a junkyard and get a wiring harness and mounts front drive accesories, any of the motors will work as long as its a 58 tooth reluctor wheel

[RedHeartbeat]

Or just put a nitrous kit on it and run it with a 50-100 shot until the engine craps the bed, then put the V8 in it. You're not going to get squat for it when you sell it most likely so you might as well have some fun with it while its in there.

[rmagni]

I may be moving soon I live in Florida now and I may be going to Wichita Kansas. So I don't want to blow it up just yet, the motor has 4K on it I have a miser car I drive back and forth to work. I see you are from Denton I grew up in Lewisville "Home of the Fighting Farmers"
Robert