Tomahawk_Motorsports

I have a 2007 nnbs / gmt900 5.3 flex fuel that I'm starting to plan the engine swap that I'll be doing next year and had a couple questions.
1. I've read there is a fuel module that supposedly the flex fuel trucks don't have that makes the engine swap harder. Most engine swap threads don't talk about this, so is this something I should be worried about?
2. Is the l9H the only 6.2? and is it a direct swap with just a computer tune.
3. Is the L9H the only 6.2 I should be looking for and / or would it be more cost effective to go 6.0 / L76 (or is there another 6.0 I should look for?)?
4. I'm planning on running the stock 4l60e until it dies - what stall speed should I get? I'll be using the truck for some towing.

Thanks for the help just trying to lay out a plan on what I need to buy.

Derek

FFDP

iTrader: (2)

Whether or not your truck has a fuel pump control module depends on what your truck came equipped with. It seems mostly all flex fuel trucks had that module because the pump flows a ton more fuel, up to around 500hp maxed out.

Just because it did or didn't have that module makes no different when it comes to engine swapping. Any 6.2 from 2007-2013 is a direct bolt in. Same with any 2007-2018 6.0 from a heavy duty or vortex max truck. It's the same GEN 4 6.0 style for all those years.

If you are just doing a engine swap, leave the stock stall. The rest is all about tuning and making it run correctly.

01FormulaTA

iTrader: (16)

Any Gen IV LS will work but some you may have to delete the VVT and/or AFM...there are multiple versions of the 6.2...you have the LSA, LS9, LS3, L99, L92, L9H, L94 etc...the L9H is a VVT 6.2 and your current 5.3 doesn't have VVT so it would not be a direct swap but can easily delete the VVT on whatever engine you decide on or even modify your harness/PCM and add the VVT....tons of possibilities, also your stock 60e won't last long with the 6.2 so you may want to look into upgrading the trans as well...

Tomahawk_Motorsports

I definitely plan on a 4l80e swap, but i'd like to get the motor in and working right and then start saving for the trans and rear differential. My 5.3 is just really tired with 180k on it right now and I don't want to get rid of the truck since its paid off.

Derek