I got a 2007 Avalanche LTZ with a 6" lift. Im trying to get more power out of it, I'm not very mechanically inclined so I have been doing some research on what I can upgrade. I started this thread to get some ideas/suggestion on what I should and need to upgrade and in what order. My ultimate goal is to have it supercharged by early next year

 

With the lift do you got some beefy tires on there? If yes what size?
I'd highly suggest a gear change. Depending on tire size either 4.10 or 4.56 and you'd have to change front and rear axle gears to match.
Check out black bear performance for tunes. They're very good.
That should help get the ball rolling!

 

Oh I also forgot to ask...how thick is the wallet haha cause that'll sway what mods to do as well haha

 

I got 34" tires. The wallet is no problem since I almost got it paid off

 

With 34" tires definitely do 4.56 gears.

 

What manufacturer do you recommend

 

What trans you running?

 

I've had good luck with motive gear.
My current diff has richmond gears and they do sing a bit at high highway speeds

 

Trans is stock. Besides the lift the only other work done to it is beefed up electrical system. To support my sound system.

 

I think nalide meant which transmission. Like 4l60 or