Shredded Beef Taco's

Ok since really good crock pot recipes are few and far between, I just have to share this one.
We made this for Josh's fam, and everyone loved it. We had it for dinner, and lunch the next day! The Bridges made it for us once and it's so awesome.

2 lbs london broil (or other cheap cut of meat)
1 whole onion chopped
1 small can chopped green chiles
1 package taco seasoning, mild or hot
2 T white or red wine vinegar
2 tsp Cumin
2 tsp minced garlic

Spray inside of crock pot with Pam
Rub Taco seasoning all over the meat
Add everything else on top of meat

Cook on Low 6-8 hours
High 4-6 hours
When it's got about an hour or so left, check the meat and shred if it's tender.
Serve in soft taco burrito things with whatever toppings you like.