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**Sheepdip** · 12-23-2018, 10:48 AM

The wire to the top of the tank is a ground wire, the 12 volts comes into play behind the dash at the gauge and to the fuse panel.

12-23-2018, 10:48 AM	#7
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,714	Re: 68 GMC Sierra fuel gage/electric The wire to the top of the tank is a ground wire, the 12 volts comes into play behind the dash at the gauge and to the fuse panel.