I have a 88 blazer here, fuel gauge never worked for me and now Im redoing the fuel system. The old sending unit had 4 wires coming out the top and 2 of them (purple and grey) going to a connecter and 2 others (black and black with white strip) spliced together and grounded to the frame. Well I got the new sending unit and its all the same expect the connect is 3 wires and 1 ground for the frame. The wires are the same colors purple black & white strip and grey going to the connector and black wire for the ground. Now what do I do with the new connector if it has a 3 wire connector?