[green beast]

What is A.I.R, how do i know if i have it?

 

[blownchevy]

AIR is smog crap....What year is your truck?

 

[onyx]

AIR is a pump that pumps fresh air into the exhaust manifolds to reduce emmisions...

 

[X2elite]

If you have it, which i am pretty sure you do, you will have a fitting that screws onto the top rear of you drivers side exhaust manifold. That is where it is on the OBS....not sure about the NBS, but i can find out.

 

[green beast]

I gotta 97. Ill check. Thanks

 

[99bluetahoe]

I have a 99 OBS and i have them on both driver and passenger side.