ok most of the meadors got to try this recently, but it was less than my best, so i'll post here so you can try it for yourself.
1 chuck roast( 2.5lbs - 3lbs)look for one with lots of marbling; those streaks of fat otherwise known as cow cellulite, it makes the roast more tender.
1 yellow onion
1-2 cups of bbq sauce (i use kc masterpiece)
1 can of dr. pepper
chop your onions and put in the bottom of the crock pot. I chop mine fine usually, but roughly chopped works well too.
Place your chuck roast on top of the onions and cover with the bbq sauce. use your best judgement. i used 1 cup the first time and wanted more the next time.
gently pour the dr pepper over the roast.
cook on low for 9 hours. your supposed to be able to cook it on high for 5 hrs, but i didn't have great luck with it.
after the 9 hrs pull the roast from the liquid that has accumulated in the crockpot( save the liquid it comes in real handy later)
with two forks shred roast. i usually take a little of the juice in the crockpot and a little more bbq sauce and mix it all up good.
serve on buns