1. Heat grill. In small bowl, mix taco mix with oregano. Brush chicken with oil and sprinkle mixture on chicken.
2. Place the chicken on grill. Cook over medium heat for 10-15 minutes.
3. Meanwhile, in a microwavable bowl, mix BBQ sauce, chili sauce and cumin. Microwave on high 30-60 seconds or until hot. Serve sauce over chicken.