PREHEAT barbecue to medium heat. Pour 2 Tbsp. of the dressing over chicken in shallow dish or resealable plastic bag. Refrigerate 10 min. or up to 24 hours to marinate.

MIX remaining 2 Tbsp. dressing, the barbecue sauce and marmalade; set aside.

PLACE chicken on grate; cover. Grill 12 to 15 min. or until cooked through (170°F), turning occasionally and brushing with sauce mixture during last few minutes of cooking. Let stand, covered with foil, for a few minutes before serving.