6.2L L92 questions

[71rustpile]

Hey Guys,
I picked up a 6.2L L92 engine out of a 2007 Escalade a couple weeks ago and have some questions. Sorry if these have been asked before but I'm almost brain dead from searching for specifics. I bought the engine minus the accessories but it included the AC bracket. I bought a Alt/power steering bracket on Ebay that included the Alt, power steering pump and water pump so now I'm only missing the AC compressor. So I'm nearly set on my accessory drive, just need to get an AC compressor.

First question is what transmission would be ideal to put behind this engine? I would like to keep my stock gauges if possible. I think stock it had a 6L80E but I've checked around and they're pretty spendy.

Next question is regarding wiring harness and ECM. Should I be looking for a particular harness and ECM or go aftermarket? I'm putting this in my rusty 71 shortbed so I'm assuming some things could be eliminated from the harness??

Last question (for now) is what is everyone doing for fuel tanks? I would like to keep my stock behind the seat tank if possible but not opposed to just plopping a cell in (or under) my bed.

All info will be greatly appreciated! My plan is to finish this swap and have my 71 sideways by spring!!

Dan

[BR3W CITY]

The 6l80e is a sweet trans but your going to pay a heavy price for it.
There are probably 2 options I would go with; I'd mostly likely go with a 4l80e. Its stout enough to handle even a souped up l92, and you can still find them on CL and wrecker yards for a decent price. There's enough out there in the way of aftermarket as well, should you decide to do a different converter etc.
You could also consider a 4l65 or 4l70, as I've heard those are much stronger than the 4l60, and becoming more available.

You'll want to get an ecm from a v8 automatic truck, it should have most of the parameters you need to plug in, and start the truck...minus the removal of VATS.

If you use a stock harness, then go with whats available, but an aftermarket piece can simplify things a lot. Mine was setup for what I wanted, with all the emissions etc already deleted. It also came with a pre wired fuse block, all I had to do was mount the block and ecm, then plug in the matching molex plugs. Engine wiring was probably a 25 minute job tops, including switching over my injector plugs to EV6 instead of Multec II (more on that if your interested).

Get rid of the in cab tank. It takes up legroom, its debateably dangerous, and it would suck to have an electric pump in the cab as well...all that humming.
There are some companies that make FI ready fuel cells, with sumps for external pumps, or some even setup with internal sending unit/ in tank pump setups. Even going with a cheap sumped AL fuel cell, and running an external pump can be done even with a budget in mind.

[mcmlxix]

make sure you get the correct year transmission... the newer the better... there are older 4L80e and 4L60e that came behind the no LSx Vortec motors... they changed around 1999/2000 depending on the truck....

Sames goes for the harness. the 07 is a Gen IV so the harness need to be for that motor. Something to do with sensor types, reluctor ring, etc....

[BR3W CITY]

the gen IV use a different # of teeth on the reluctor ring. They are also variable valve motors so the cams are different.

I'm pretty sure the year of the trans doesn't matter if your planning a rebuild. Stock for stock, the newer stuff is better, you are correct.

Also, make sure you find a trans with the correct tail shaft. Getting a 4wd trans will cause headaches for a 2wd swap.

[c10seconds]

Are you going to use car accessories and intake? Do you plan on removing the VVT?
Posted via Mobile Device

[mcbassin]

The 6L80 is bad A but I bet they cost a truckload of cash. I would think a well built 4L60e or stock 4l70 or a 4l80 would do what you need depending on what mods you make.

You can buy some of your missing parts on LS1 site. They have lots of sellers in the classified section. I just picked up a dbw pedal for my setup over there pretty cheap.

I picked up a Blazer tank from Kennys trucks pretty cheap. I am planning on using a Walbro external pump. You can spend as little or as much as you want for a tank/pump setup.

[71rustpile]

Originally Posted by c10seconds

Are you going to use car accessories and intake? Do you plan on removing the VVT?
Posted via Mobile Device

I plan on using the truck accessories and keeping the VVT. Planning on getting a comp cams VVT cam, read that it will bump it up 69HP. Thanks for all the info guys, keep it coming!

[71rustpile]

Thanks again for all the great info! Now I've decided the 4L80E will be the best route to go bang for buck. My question is can the 4L80E be tuned to work with my VVT L92? Any help with this would be great so I don't waste a wad of cash on something that won't work. Anyone familiar with the tuner programs that could check to see if its possible to tune that combo?

[Mr. 250r]

Well in terms of 4l80e there are a good amount many differences mine being 91 has neutral safety switch on the steering column now after that I think there is about 3 more wiring changes and also a 4l85e as well but the second years I think had the 4 wire neutral safety switch on tranny then the other plugins which can be swapped into the older years like mine, after that the neutral safety switch went to I think a 6 wire and then on to even more ill take a pic of my 05 wire tomorrow but anyways just a little info hope its not too confusing but aside from some internal changes, neutral safety switch move and more wires all good :-p
Posted via Mobile Device

[usmcchevy]

Originally Posted by 71rustpile

Thanks again for all the great info! Now I've decided the 4L80E will be the best route to go bang for buck. My question is can the 4L80E be tuned to work with my VVT L92? Any help with this would be great so I don't waste a wad of cash on something that won't work. Anyone familiar with the tuner programs that could check to see if its possible to tune that combo?

Defiantly talk to a tuner. I have no idea about the VVT, but the 6.2 can be made to work with a 4l80e. When they went to the GEN IV 58x engines, they also went to separate controllers- Engine control module (ECM) and trans (TCM). The 6L80E has the TCM in the pan, but the 4l80e is separate and mounted next to the ECM. PM member Shon, he tunes and may be able to help.

[mooseknuckles]

6l80e's are the six speed auto's?

[usmcchevy]

Originally Posted by mooseknuckles

6l80e's are the six speed auto's?

Yep, and the 6L90E's

[BR3W CITY]

gm is gonna run out of numbers for these... some day, that 10L95e will come out lol

[mooseknuckles]

the 6 speed auto would be nice...but I'm sure the price would be ridiculous..as would finding a used one...

[Mr. 250r]

a quick search of them rebuilt or some problem ranged from 1500-2200 for the 2010-2011 1500 and 2500s