[timgco]

This has been talked about a lot here! The 03's had the most issues with the air susp. IMO. I lost two air bags and had a few dealer trips due to the air susp. on that truck. Because of this happening, I was also stranded on a trail.. AFter that, I opt. for no more air susp. Solid steel springs make me feel better about the susp. and saftey on trails. Others have zero issues.

So, yes your compressor will turm on and off while driving and sitting at stoplights. That part is normal.

When you come out to your truck in the morning and it's sitting low, that's not good. Do you have anything screwed into your fitting in the back of the truck (where you screw your hose into) If so, unplug it, that's your issue.

You can check your ride height arms in your rear wheel wells to see if they are damaged.

Otherwise off to the dealer you go.

If you're really sick of this issue, you can swap out the air bags for springs. It may be a cheaper route if you are out of warranty.