Is there a code in the vin or some where on the vehicle that will tell me ???

 

Look for the sticker in the glove box, you are looking for the RPO code: G80

 

Yup or get the rear end on gravel or sand & step on it! If you only have one tire (passenger side) tossing rocks then Nope - open rear end. If one side spins for a second then you see 2 tracks & of rocks being tossed - G80 rear end.

Cat is right, the glove box should have the RPO code G80 in the #'s... my way is a little more fun is all lol.

 

just like I thought no g80 in the jimmy i got a guy at work that wants to sell me one installed and every thing for 250 im gonna jump on that

 

G80, for sure. Be careful though, a worn out G80 unit will act just like an open diff. So, I agree with Rottidog: get that little truck on some dirt or gravel and stomp the **** out of it! If the rearend grenades, then it was probably on it's way out anyway.

I put a G80 in my 2wd s10 pickup, and it works great in the snow

 

the guy im getting it from builds moters and the rear end was going in to his 83 monte its pushing 425 hp out of his built 350 so if it was going in that im sure its gonna hold up he goes through every thing he gets pretty damn good

 

That's a great price installed, just make sure it has the same gear ratio as the front diff!
Should have posted this ealier
http://www.compnine.com/vid.php paste or type your VIN there

 

Thanks man thats a great link I have tried looking up vins before and it was a pain in the *** says mine is a 3.42

 

Is there a way to wire it to a switch, instead of it being automatic?

 

Resurrecting decade old threads for a question is generally frowned upon. Better to start a new thread to ask questions.

That being said, no. The G80 is a mechanical locking differential, and it basically just uses springs and counter weights to sense when the two wheels are spinning at different speeds, and will lock them together. There are no controls or sensors that you can modify to control the G80. You'd need to install an aftermarket selectable locker to have that control.