woodwalker

looking for some good info on doing this swap. What will work and what wont. Saw some posts on 2007 and older. Any help appreciated.

FFDP

iTrader: (2)

Buy one, swap it, tune it and pray the 4L60e holds together.

There really is nothing else to it, they are basically a 100% direct swap. Minimal things like VVT can either be kept or removed/tuned out and same with the AFM/DoD stuff depending on where the 6.2 comes from and what year.

woodwalker

Thanks I have read some are changing the servo in the tranny to a corvette is the true?

FFDP

iTrader: (2)

That can be helpful in gaining extra line pressure and firmer shifts but that won't make it any stronger. A stock 4L60e can barely handle stock power levels with abuse, add another 80hp and 100ftlb torque and it's pushing it even harder.

woodwalker

Thanks for the help. Think i may go this route found a 2008 mod. engine with 54k can always up grade tranny later.I may have more questions later. Thanks again

ZO6Ted

I've thought about buying a 08-13 to mod because I really like the 6 speed. I would want RCSB 4x4 but I guess I'd have to do a 6.2 swap as well. Do you have a favorite year on Sierra's? I just prefer the styling on these yrs over the Chevy.

FFDP

iTrader: (2)

You'd want a 2010+ to make sure it has a 6L80e behind it from the factory on a 5.3 truck. A 4.8 work truck would only have the 4L60e still.

woodwalker

FFDP I bought this truck new in 2008 it has 89k on it and it is a 4X4. I guess it has the 4L60E. Where is a good place to get tuned. Dealer or send computer out?

FFDP

iTrader: (2)

It would have to be custom tuned. Ideally some place that could tune it in person or depending on where you live maybe even someone from this forum that does tuning.

A dealership wouldn't do this type of thing.

woodwalker

Ok thanks again when i get closer prob need more info. I don't know much about this new model stuff. Always messed with non efi.