Prep the Ingredients: Slice the steak, onions and bell peppers into strips.
Make the Marinade: Add olive oil, orange juice, brown sugar, garlic, cumin, chili powder, salt and pepper to a bowl and whisk together.
Place steak and vegetables in a zip top bag and pour the marinade over the top. Press the air out of the bag and seal. Turn the bag over several times to coat the steak and vegetables in the marinade.
Refrigerate for 1 hour or up to 24 hours.
Prepare a grill fire to 350° using hickory or oak for smoke flavor.
Place a grill pan onto the grill and place the marinated steak and vegetables into the pan.
Cook with the grill closed, stirring every 5 minutes.
Continuing cooking until steak and vegetables are cooked through and steak reaches around 145° using a digital meat thermometer.
Remove the grill pan onto a sheet pan.
Warm the flour tortillas, fill with sour cream, rice, grilled steak and peppers and pico de gallo.
Roll up the burritos and serve immediately.