01 -
Whisk salad dressing, garlic powder, and salt together in a shallow baking dish; add chicken breasts and turn to coat. Cover the dish with plastic wrap and marinate in the refrigerator, 4 hours to overnight.
02 -
Preheat an outdoor grill for high heat and lightly oil the grate.
03 -
Remove chicken from marinade and shake off excess; discard remaining marinade. Cook chicken on the preheated grill until no longer pink in the center and the juices run clear, about 7 to 8 minutes on each side. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).