First there was a scweaking noise on front end, next day LOW COOLANT light came on, so i add about 3/4 of galon, next day i see antifreeze leaking from under my truck, and the antifreeze resiuar was empty, but the light is no on yet, any idea whats the problem could be? thanks

Possible water pump?

Thats right, dealer figured it out, they put under presure over night and sure the water pump, and the closet one from is in detroy