PREHEAT grill to medium heat. Slice wieners at 1/2-inch intervals, being careful to not cut all the way through the wieners.
GRILL wieners 6 minutes or until wieners begin to curl and are heated through (160°F), turning after 3 minutes. Meanwhile, microwave the CHEEZ WHIZ as directed on label.
PLACE wieners in buns. Spoon about 2 Tbsp. of the CHEEZ WHIZ into center of each wiener.