dual tank plug connection - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hotrodhomi · 03-08-2005, 02:25 PM

Does any one know what year GM changed the wiring for the dual tanks switch. I'm talking about the plug that is on the firewall. It seems that the 70's trucks had four wires to the plug and my '81 has three. I've been to three yards and I can’t find the right one. They all have a four prong plug while mine has the three.

79BIG10 · 03-08-2005, 08:30 PM

My 79 has a 4 wire as well. I wonder if it may have been in 80 or 81.

03-08-2005, 02:25 PM	#1
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	dual tank plug connection Does any one know what year GM changed the wiring for the dual tanks switch. I'm talking about the plug that is on the firewall. It seems that the 70's trucks had four wires to the plug and my '81 has three. I've been to three yards and I can’t find the right one. They all have a four prong plug while mine has the three.

03-08-2005, 08:30 PM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	My 79 has a 4 wire as well. I wonder if it may have been in 80 or 81. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

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