I am trying to replace a fuel pump on a 99 burb and the after market wires are a different color than the oem that is on it now does anyone know what color goes with which. Orginal wires purple, grey, and 2 black and the after market has grey, orange purple and black. Can anyone help me

 

Isn't there a connector to just plug in?
The factory wires are grey - Fuel pump + , purple - fuel level +, and both blacks are ground

 

+The new after market fuel pump comes with a new different style connector you have to cut the old connector off the fuel pump and put the new connector that comes on the fuel pump and the wires on new one are different colors.Is trhere anyone out there who understands what am saying. The new after market fuel pump did not include a wire diagram.

 

I understand what your saying. If you look at the pump itself, you'll see 2 wires going to it. One is probably gray(+), and the other will be the ground. If you look at the fuel level sender, it will have 2 wires as well, one probably being purple(+), and the other will be ground.

 

I was under the impression they always sold you a new wire harnes to plug the two together?