The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1973-1991 Dual fuel tank systems theory of operation

**cdub2010** · 07-24-2023, 10:28 PM

My fuel gauge was inconsistent. I was using a simple test light.

Fixed the issue today. The problem was the ground wire on the tank selector switch. Found it was hacked up and just twisted together. Had to remove the dash to get a good look at it and fix it properly. Truck fired right up.

07-24-2023, 10:28 PM	#161
cdub2010 Senior Member Join Date: Apr 2014 Location: detroit mi Posts: 206	Re: 1973-1991 Dual fuel tank systems theory of operation My fuel gauge was inconsistent. I was using a simple test light. Fixed the issue today. The problem was the ground wire on the tank selector switch. Found it was hacked up and just twisted together. Had to remove the dash to get a good look at it and fix it properly. Truck fired right up.