Ditto on the jack stands. I use 4X6 wooden blocks placed on the jack and then jacked against where ever you need a lift point, and it gives you another four inches of travel. I hate to use the rear dif as a lift point for reasons I can't explain very well. Maybe some one else can give an opinion on that.
2001 GMC Extended Cab, Pewter (what else), SLT 3500 4X4 Duramax/Allison Line-X, Billet Grille, J&J stainless running boards, Snugtop Tonneau Cover, Striping by Bridge, Jordan 2020 brake controller, Ultra forged alum wheels, 30-gallon cross bed fuel-and-tool box.