Place the chuck roast in the bottom of your crockpot.
Sprinkle the taco seasoning and carnitas seasoning evenly over the roast.
Add the sliced onion and diced green chiles.
Pour the entire jar of salsa verde over everything, then squeeze the lime juice over the top.
Cover and cook on HIGH for about 6 hours, or until the beef is fall-apart tender and easily shreds with a fork.
Shred the beef directly in the crockpot and toss it in all of those salsa verde juices.