Fuel Sending Unit..

[GMCYukalade]

Does anyone have the wiring scheme for it..? I know the Big black wire is the Main ground, and I know the Big Grey Wire is the Power - But what is the Small Black, and The Purple with the White Stripe - if it helps, i'm trying to hook up an after-market fuel guage - reason being the guage in the cluster is well... literally doing circles

 

[aaron72]

You'll probably have better luck posting this in the forum for the correct year of your truck

 

[GMCYukalade]

Sorry bout that new to the forums...