Chipotle pulled pork sandwiches

1 T brown sugar
2 t salt
2 t garlic powder
1 1/2 t ground mustard
3 t chili ower
1 boneless pork shoulder 3 lb
1 8oz can of tomato sauce
2 canned chipotle chilies, finel chopped
1 T adoo sauce from canned chipotle chiles
20 burger buns split

Mix brown sugar, salt, garlic powder, mustard and chili powder. Rub seasoning mixture over pork. Place pork in slow cooker
Cover cook on low for 7 to 8 hours
Remove pork from slow cooker. Place on cutting board. Remove liquid, skim fat and reserve liquid.
Cool pork slightly.
Shred pork.
Return shredded pork to slow cooker.
Stir tomato sauce, chipotle chilies and adobo sauce into shredded pork.
Stir in some of he reserved cooking liquid for moistness.
Increase heat setting to high.
Cover and cook for 15 to 3 minutes.
Spoon about 1/3 c pork mixture into each bun.