dual tanks dealer add on - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kglowacky · 05-17-2020, 09:21 AM

just noticed as I walled by my truck bed that the gas filler holes on both sides of my truck are different. The drivers side has a recess where the filler neck bolts to the bed and the pass side does not. I also discovered I don't have a dash switch hole for the gauge switch change in the cab. I do have a two way valve under the seat. I do have both tanks and hangers. Did they come with only one side recessed and/or did dealers add these at the dealerships upon request.

1976gmc20 · 05-17-2020, 12:12 PM

Standard was passenger tank; driver side tank was optional.

I did have the dealer add a tank to my 1980 but they put in a factory type switch. Obviously the filler was different because by then the factory tanks had a door.

Lots of tanks got added back in those days by other than dealers, either other shops or folks did it themselves. There were saddle tank kits available for the pre-1973 models long before the square bodies were introduced. I put on several extra tanks when I worked for an RV dealer back around 1974 or so.

kglowacky · 05-17-2020, 12:27 PM

correction on my thread. The pass side is indented drivers not so what you say I agree with. Thanks
anyone have a beat/rusted beyond repair pass side bed that has the recess they want to sell. all I want is about 4 inches square around the recessed filler hole. mine is a 78 model no door

05-17-2020, 09:21 AM	#1
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 588	dual tanks dealer add on just noticed as I walled by my truck bed that the gas filler holes on both sides of my truck are different. The drivers side has a recess where the filler neck bolts to the bed and the pass side does not. I also discovered I don't have a dash switch hole for the gauge switch change in the cab. I do have a two way valve under the seat. I do have both tanks and hangers. Did they come with only one side recessed and/or did dealers add these at the dealerships upon request.

05-17-2020, 12:12 PM	#2
1976gmc20 Registered User Join Date: May 2015 Location: Montana Posts: 3,696	Re: dual tanks dealer add on Standard was passenger tank; driver side tank was optional. I did have the dealer add a tank to my 1980 but they put in a factory type switch. Obviously the filler was different because by then the factory tanks had a door. Lots of tanks got added back in those days by other than dealers, either other shops or folks did it themselves. There were saddle tank kits available for the pre-1973 models long before the square bodies were introduced. I put on several extra tanks when I worked for an RV dealer back around 1974 or so. __________________ Current/past Chevy/GMC trucks: 1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner

05-17-2020, 12:27 PM	#3
kglowacky Registered User Join Date: Mar 2020 Location: The Woodlands,Tx Posts: 588	Re: dual tanks dealer add on correction on my thread. The pass side is indented drivers not so what you say I agree with. Thanks anyone have a beat/rusted beyond repair pass side bed that has the recess they want to sell. all I want is about 4 inches square around the recessed filler hole. mine is a 78 model no door



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