Prepare the Marinade: In a small bowl or resealable bag, mix all marinade ingredients. Reserve ½ cup for the vegetables.
Marinate the Chicken: Add the chicken to the remaining marinade, ensuring even coating. Marinate for at least 30 minutes or up to 4 hours.
Preheat the Grill: Set the grill to medium-high heat (about 400°F).
Season the Vegetables: In a large bowl, toss the bell peppers, onion, and pineapple chunks with 3 tablespoons of the reserved marinade.
Assemble the Skewers: Thread the marinated chicken and seasoned vegetables onto skewers.
Grill the Kabobs: Cook for 12–16 minutes, turning frequently. Brush with the remaining marinade while grilling.
Check for Doneness: The chicken should reach an internal temperature of 165°F. Remove from the grill promptly and serve hot.