I have a stock 2004 gmc sierra with push button traction control, can someone tell me:

what rear end I have?

Is it posi with traction control button pushed?

Will it handle a supercharger stock the way it is?

 

Might help afew others,But what motor is in the truck? Is that traction control or the tow mode buttong you are pushing? I have an 06 GMC with the 4.8 and I have a 3.23, But I still have the window sticker and thats where I got mine from.. 2wd or 4wd?

 

Look in your glove box for a sticker with a bunch of numbers on it write them down and then find them all on this.
http://home.swbell.net/greghud/RPO.html

 

You can also google VIN Decoder and type in your VIN and it'll tell you what you got.

 

Is the truck a 1500? Also trucks do not have Posi-Traction.
GM Trucks have locking rear differentials. They react and operate
totally different from each other. The locking differential carrier is
mechanically operated, it is not controlled by the traction control.
I have seen stock 10 bolt differentials take a beating. Really depends
on driving style and application.

 

My 10 bolt has taken one hell of a beating at my power level(600+whp). I'm actually surprised it has lasted, and almost every time I run it really hard it's always in the back of my mind.