This is just a curiosity question. I just got my EXT about a month ago so I don't know alot about them yet. When I start it up and begin to drive, after about 20 feet or so I hear some kind of electrical motor noise for just a second. It's pretty loud. What is this?

I belive it's the air compressor behind the rear driver side tire.

it's normal

I figured it was normal and had something to do with the suspension. I was just wondering what exactly it was. Thanks guys.

You are correct....no problem.

Yes it automatical turns on to level the headlights. You will hear it run longer if you park on a incline too.

Yes it automatical turns on to level the headlights. You will hear it run longer if you park on a incline too.

auto leveling headlights? escalade? since when?

auto leveling headlights? escalade? since when?

Thats what my owners manual says about the air compressor that comes on to lift the rear up to level the headlights. I will reread it again to make sure I read it right.

This is just a curiosity question. I just got my EXT about a month ago so I don't know alot about them yet. When I start it up and begin to drive, after about 20 feet or so I hear some kind of electrical motor noise for just a second. It's pretty loud. What is this?

LOL, it's the ambient air sensor. It;s installed above your head in the headliner. I just had mine replaced under warranty.