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#1 |
Franko72
Join Date: May 2004
Location: Cincinnati,Ohio
Posts: 471
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saddle tanks question
the glove box sticker shows aux saddle tanks as an option that is on my truck. My question is do both tanks have sending units installed. I am currently only running on the behind seat in cab tank because when I bought the truck it sat for a long time. Tanks need removed and flushed.There is a selector switch on the dash.I think that it has a short because I have to mess with it to get the correct reading on the cab tank.There is a 3 way switch on the floor near the drivers side.
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![]() 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust |
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#2 |
Senior Member
Join Date: May 2001
Location: West Central Minnesota
Posts: 568
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If there is a switch on the dash (left of the instrument panel) there should be a sending unit in at least the left tank. How is the right (passenger side) tank filled? Your driver side tank should fill through the side of the box at the same height as the cab tank. You should be able to crawl under the truck and see if there is a wire running to the right side tank, that would indicate the presence of a sending unit. The factory setup was the left side tank only, the right side was probably added at the dealership or later by a previous owner. Usually a setup like yours will have a sending unit in the left tank and nothing in the right. Your dash switch should only have two positions, one for the in-cab tank and one for the left tank.
Bob
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V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel Last edited by BobS; 12-16-2004 at 07:27 PM. |
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#3 |
Registered User
Join Date: Apr 2003
Location: NB
Posts: 3,367
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Wow thats crazy! You can have 3 tanks!
I thought the saddle tanks or cab tank was the options! |
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#4 |
Senior Member
![]() Join Date: Dec 2002
Location: Portland, Oregon
Posts: 901
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I have 3 tanks; a sender in each tank and a 3-way switch to read the furl level in each tank...............
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'71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal). |
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#5 |
Senior Member
Join Date: May 2001
Location: West Central Minnesota
Posts: 568
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Some dealer installed or aftermarket setups have senders and a three way switch. Does your switch have a black knob on it like the other dash knobs?
Bob
__________________
V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel |
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#6 |
Senior Member
![]() Join Date: Dec 2002
Location: Portland, Oregon
Posts: 901
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No 'black knob' switch....I installed a 3 position switch under lip of instrument panel; wired to existing fuel quanity gauge and to each tank.
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'71 GMC;fleetside;PB/PS/AC/CC/402 Eng./Custom Paint/110,000act miles/3 fuel tanks(52gal). |
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#7 |
Franko72
Join Date: May 2004
Location: Cincinnati,Ohio
Posts: 471
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my dash has the black knob with main and aux. sticker above it.So you say that the dealer probably added on the passenger side tank. There seemed to be a few dealer add ons to this truck.The over cab running lights, the front bumper guards,the unity spotlight thru the window, the trans . cooler set up , and last the air horns on top of the cab.I forgot to mention the spear on the hood .
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![]() 1972 C20 cheyenne Super 402 BB/400 turbo LWB A/C Tilt, Cruise Control, Saddle tanks, Tach My Home Page Better to burn out than it is to rust |
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