new seats

please tell me that chev put seatbelt anchors somewhere else than just on the seats themselves... where do you tie in a harness? i have a set of racing seats for my truck but am stumped as to where i am suppose to put the harnesses. the seat has built in seatbelts... there has to be some way, or somewhere for that matter, to put these seats in and be able to use my harness... please help

leesifer