I've had my '02 Denali with Q/S going on 5 years and I have felt like a Lone Ranger out here. Can't believe I didn't find this forum sooner! My Denali is mostly stock but I did put MagnaFlow dual exhaust, hard ARE tonneau cover and a new hood with a scoop (virtually free upgrade after crunching up the stock hood in a minor front-end wreck). I'll post a picture as soon as I take a good one.

I've put 150,000 mostly highway miles, still on original front brakes, and have done absolutely no maintenance to the Q/S unit. What kind of maintenance should be done? Mine moans and groans when backing-up so I'm sure something needs to be done.

I don't mean to sound like an ignoramus but this thing is so rock solid and dependable that I just "drive it and forget it"!

Anyway, looking forward to hearing from you guys and I'll try to stay active to lend whatever support I can!

Welcome maniac...It took me some time to to find the site. Lots of good info here. Some threads will show when you change the rear diff fluid be sure to use the anti-friction adative. You should find it fairly simple (I just can't think right now) otherwise someone will chim in.