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

52napco · 06-29-2022, 10:04 PM

Pretty sure the dash switches are not interchangeable between the depress fully to the later style..I think the power and grounds are opposite and the plug won't interchangeable.
My truck is 1991 and the older style wouldn't work.

06-29-2022, 10:04 PM	#134
52napco Registered User Join Date: Jun 2014 Location: upstate sc Posts: 2,095	Re: 1973-1991 Dual fuel tank systems theory of operation Pretty sure the dash switches are not interchangeable between the depress fully to the later style..I think the power and grounds are opposite and the plug won't interchangeable. My truck is 1991 and the older style wouldn't work.