Figured I'd check here before tearing into it.

Mom's 02 4wd Tahoe. Has autoride on it. The truck feels REALLY loose. I checked tie-rods, balljoints, wheel bearings, all seem fine. I was thinking shocks were shock. She said the rear leveling hasn't been working in a few months. I'm assuming that's why front isn't working right. It's like the shocks are empty. Truck has 120k on it. What components are there to check on this? I know there was a pump for the auto-level, think it controls front as well. Besides Fuse/Relay, where do I look? (This is probably more directed to gas-guzzler...but anyone is welcome to chime in) I think the auto-ride is dumb on a truck (but amazing when towing), give me my stiff suspension and off-road shocks