Marinate the chicken. In a bowl, whisk together chipotle sauce, ranch dressing, and lime juice. Add the chicken breasts, coating them evenly. Cover and marinate for at least 30 minutes (or up to 4 hours for deeper flavor).
Preheat the grill. Heat your grill or grill pan to medium-high. Lightly oil the grates to prevent sticking.
Grill the chicken. Cook chicken for about 6–7 minutes per side, or until the internal temperature reaches 165°F. Let rest for 5 minutes before slicing into strips.
Sauté the peppers. In a skillet over medium heat, add a touch of olive oil and cook the chopped bell peppers for 3–4 minutes until slightly softened but still crisp.
Assemble the burritos. Lay out the flour tortillas. Spoon sliced chicken down the center of each, then top with peppers, cheese, and cilantro. Drizzle extra chipotle-ranch sauce if desired.
Wrap and grill. Fold the sides over, roll tightly, and place burritos seam-side down on a hot grill or skillet for 1–2 minutes per side, until golden and slightly crisp.
Serve and enjoy. Cut in half, serve warm, and enjoy the smoky-spicy-creamy goodness with an extra squeeze of lime.