Bbq pulled pork sandwiches

I got this recipe from my friend Christina. It is very yummy !

1 pork shoulder roast
1 bottle (14 oz) BBQ sauce
1 Tbs fresh lemon juice
1 tsp brown sugar
1 medium onion, chopped
8 hamburger buns or rolls---hoagie rolls are delightful with this!

Directions:
1. Place pork roast in crockpot. Cover; cook on low for 10-12 hours or on high for 5-6 hours.
2. Remove pork; shred meat with 2 forks. Discard any liquid in slow cooker. Return pork to slow cooker; add bbq sauce, lemon juice, brown sugar, and onion. Cover; cook on low for 2 hours or on high for 1 hour longer.
3. Serve on buns/rolls.