2005 Tahoe: When I come to a stop sometimes it seems as though the brakes are still on after I let the brakes off and move forward. What's up with that?

Sounds like a typical "frozen" caliper syndrome, with the car jacked off the ground(preferably on a lift) have someone sit in the cab and hit and release the brake pedal, while they do this test each wheel by hand to see if you can feel it stop turning and then completely release after the brake is released by your partner, if you find one or more that stay holding remove the wheel and inspect the disc pads and hardware for excessive wear and try to pry the caliper piston back into it's bore with a beefy 10" sort of pry/flat bladed screw driver/bar.
If it wont compress the piston or pistons those are the ones you may need to replace, also visually inspect the looks and appearances of the "rubber" brake line hoses that feed to the calipers, they sometimes rot out and cause the same situation, if they are cracked and nasty looking replace them as well, better safe then sorry especially when it comes to brakes, a dollar saved sometimes can cause more damage then anticipated.
Be sure when you do this test the vehicle is only idling in neutral and not in gear for safety sake!!! Also wear protective clothing/eye wear.