14+ Gm Fuel Sending Unit Wiring Diagram. I know that there are probably two wires serving the fuel level sending unit (i'm guessing purple and another color?), which then go. Well, it's finally time to get this gm fuel sending unit replaced.
I have a 20 gallon tank, but with the square style mount fuel sending unit. For the 1993 fuel pump wiring diagram, check out the following article: Fuel pump/fuel gauge sending unit replacement.
I do hope this will be another useful thread and a useful resource, and to start it off with, i have attached a document which shows the mercedes 'speed pulse.
14+ Gm Fuel Sending Unit Wiring Diagram. Stuzman decided to put in. They have copies of the original gm wiring diagrams for your truck for $8. Ground the sending unit wiring to a good chassis ground (instead of the sending unit housing) and watch the gauge. Purchased this truck for my son last year before knowing about the fuel gage issues.