1999 2 Door Tahoe LSX Swap

[redaddiction]

Time to do another swap, this time a 2 door Tahoe. I picked up a 5.3/4l60e combo last night for $350.00. I'm hoping I still have some extra parts laying around for brackets/intake etc.

Here is the truck I'm working on. It actually will not be here until later today.


25A59A3E-717B-4BDA-BBE9-33DAB51C677D_1 by MarcusRyan, on Flickr

Parts List for Reference

GM 19260102 Engine Flywheel
GM 12563532 Spacer to resuse stock trans 1
GM 19257940 Flywheel bolts x 6
72C2265 Pace Setter Performance Armor Coat Long Tube Exhaust Header
82-1176 Pace Setter Off Road Y-Pipe
DD-2575-4 Dirty Dingo Mounts for 88-98 4wd
Lextech ECM/Alternator Bracket/AC Bracket
P/N 182-2277 Temp sender adapter 12MM to 3/8 NPT female $9.99
P/N 182-2268 Oil Sender adapter 16mm to 1/8 NPT female $10.99

[daytripper67mi]

Nice truck....that is a steal for a 5.3/4l60e combo.

[redaddiction]

Here are a few pics of my motor, waiting on someone to buy my other two door before I start ordering mounts, etc.


Untitled by MarcusRyan, on Flickr

[redaddiction]

Untitled by MarcusRyan, on Flickr

[00shortbox]

Wow you got a steal for that engine and tranny! Almost better than my free LS6 with a dropped valve lol. Good luck with the swap, that's a nice looking Tahoe!

[redaddiction]

Wow you got a steal for that engine and tranny! Almost better than my free LS6 with a dropped valve lol. Good luck with the swap, that's a nice looking Tahoe!

I'd take an ls6 over this any day. I do plan on selling the trans though and recouping some if not all of my cost. The overall goal is to do this swap as cheap as possible. That means repinning the factory 99 harness over to ls1 instead of using an aftermarket harness. I won't be stingy on the important things like the mounts, I have a set of ebay's and they are worthless so it will be dirty dingo mounts for sure.

[daytripper67mi]

I'd take an ls6 over this any day. I do plan on selling the trans though and recouping some if not all of my cost. The overall goal is to do this swap as cheap as possible. That means repinning the factory 99 harness over to ls1 instead of using an aftermarket harness. I won't be stingy on the important things like the mounts, I have a set of ebay's and they are worthless so it will be dirty dingo mounts for sure.

Please document the wire harness as you do it,I have read you can use the obs harness with a 0411pcm and extending the injector wires.

[redaddiction]

Please document the wire harness as you do it,I have read you can use the obs harness with a 0411pcm and extending the injector wires.

I've read it also but haven't found any decent pictures or documentation of it. From what I hear though all you do is repin the harness to an ls1 pattern and reprogram the computer. If anyone has any links or info I'd be glad to hear about it.

[redaddiction]

Ok for my own info this is what I've read for converting a Gen III Vortech to a Gen IV LS1.

Repin harness to ls1 pinouts
Change the Injector Plugs to LS1 style
Reflash PCM
This spot if for one thing I know I'm missing.

[pl4yboy]

Lextech is a member here as well.