To create your own Chipotle Ranch Grilled Chicken Burrito, follow these step-by-step instructions:

1. Marinate the Chicken: In a bowl, combine the garlic powder, onion powder, smoked paprika, cayenne pepper, salt, and pepper. Rub this mixture onto the chicken breasts and let them marinate for at least 10 minutes.
2. Preheat the Grill: While the chicken marinates, preheat your grill to medium-high heat.
3. Grill the Chicken: Place the marinated chicken breasts on the grill and cook for 6-8 minutes per side or until the internal temperature reaches 165°F (75°C).
4. Slice the Chicken: Remove the chicken from the grill and let it rest for a few minutes before slicing it into strips.
5. Warm the Tortillas: Slightly warm the tortillas on the grill for 1-2 minutes per side to make them pliable.
6. Assemble the Burrito: Place a portion of grilled chicken strips in the center of each tortilla. Top with shredded lettuce, diced tomatoes, shredded cheese, sliced olives (if using), and a generous drizzle of chipotle ranch dressing.
7. Roll the Burrito: Fold the sides of the tortilla over the filling, then roll it tightly from the bottom to the top.
8. Grill the Burrito (Optional): For a nice grill mark and a crispy exterior, place the rolled burrito back on the grill for 1-2 minutes per side.
9. Slice and Serve: Cut the burrito in half, and serve with additional chipotle ranch dressing on the side if desired.

These straightforward steps will guide you in crafting a marvelous Chipotle Ranch Grilled Chicken Burrito.