Has anybody done or know of an LMG swap? I'm going to pick up a complete 07 LMG 5.3 engine for $225 this weekend (supposedly has a broken rod), and was wondering what should be used pcm wise? As far as I can tell, in stock form it uses a pcm and a tcm, which seems like a headache to me. I was thinking ls2 pcm but I'm just not sure. I'm not going to keep the FF/VVT functionality. Any advice/suggestions/information would be greatly appreciated.

Edit: Engine turns out to be an LMG 5.3, Even better yet.
Edit2: or not

 

Broken rod suggests thrown rod. Hopefully you didnt pick up a $225 paper weight

Since you already have to tear it down to replace at least one rod, the crank will be out. You can swap the 58x reluctor ring for a 24x reluctor ring and use a more common Fbody harness/PCM. Some sensors will have to move around like the cam and knock but function will be the same. This removes VVT and lets you choose between DBC and DBW

Plan B is to use the 58x reluctor on the crank and use a LS2 or any other GEN IV control system. You must use DBW for these, but VVT presence or absence is taken care of in the tune

Now that its been said, why are you dumping VVT? Its a VERY good thing

 

If the block isn't usable I'll just strip it and sell the coils, intake, heads etc. and scrap the block and make my money back and then some.

Dumping vvt because I'd like to run DBC and was hoping to run an 0411 pcm. I'm just weighing my options at the moment so vvt isn't completely out yet, but money is a factor as well.

 

Ive got a 0411 PCM fs and i build harnesses

Just so ya know

 

Oh I'm aware . I should be able to handle the wiring, but I'll get ahold of you if I need some assistance. My swap is gonna take a while. I've got a lot of parts to get and not enough money. Damn expensive hobbies.

How much for the 0411?

 

http://www.ls1tech.com/forums/parts-...-0411-pcm.html

 

Alright, so I tore this motor down and now I've come to the conclusion that it must be an LM7. I was told it was out of an 07 Suburban, which (supposedly) was a gm test vehicle. BUT, it has a 24x reluctor wheel and a derivative vin of what I believe is N3R291513 and 862 heads.
Damage is #7 rod broke in half and destroyed the piston and scored the cylinder wall pretty good. I'm gonna have to get it bored quite a bit, I'll probably just go to 3.905"

Piston carnage:

 

GEN III's were still used in work vans in 07. You got no prototype

Punch it out to make an iron 5.7L LS1 and use the LS1 rotating assy. Crank and rods are the same as your 5.3

 

Yeah, I knew it wasn't a prototype of any kind, I just wanted to figure out what the dang thing was, which was a little easier after I tore it down.
My plan is to get it bored to 3.898 or 3.905 and run some Speedpro hyper pistons and Scat forged rods. I'm not gonna go wild on it. I might put a mild cam in it. Should be fun.
Question, can I run the truck fuel rails on an ls1 intake? I think I read somewhere that I'll have to use spacers to bolt them down. Is that it?

 

Yes, but it looks terrible. It wont fit the contour of the LS1 intake. You need the rails, truck injectors and some spacers. Car rails/injectors can be had for around $80. Why not?

FYI, stock rods are powdered metal forged. If you arent pushing crazy power then upgrading rods is a waste. Rotating weight is about all you'll save there. Rod bolts on the other hand are a must if you plan on spinning above 6,000

The crank isnt too bad either...