04 2500 suburban build
- Thread starter 60beforetruck
- Start date
rayra
Expedition Leader
The GMT800 Subs & Tahoes are down the driver side, from under the 2nd row seat to just ahead of the rear axle.
I just took mine out <2wks ago to change my fuel pump. If one had big tires and/or a big lift, it would be pretty straightfoward to put a 5-6" tall rectangular space and drop or duplicate the whole framing support for the standard spare tire mount below the added tank and double the fuel capacity of the vehicle.
I've already seen some dual tank mods on these vehicles where two filler necks / caps are fit behind the factory door. Fill them both, rig the secondary as a transfer tank with a hard-plumbed pump on a dash switch. Run down the stock tank and flip the switch to dump the other into it.
hmm I didnt' take any pics of that big space while I had the spare and fuel tank out...
There's steel intermediate plumbing in the fuel filler and primary vapor vent lines running from tank to filler. Be easy to re-work or tap into that section for transfer plumbing. Any muffler shop could weld a 1/4"-5/16" barbette onto that metal section, after you dismount it. and 12v fuel pumps are cheap -
38"x38"x4" is 5,776cu",~231cu"/gal, that's 25 gallons. Call it ~6gals per 1" of tank height. 5" equals / double your stock tank.
Cost a lot more than 5-6 20L jugs, but if you can fab much of it yourself you'd save a lot of the cost. Having a custom aluminum tank with some slosh baffles in it would be real nice, with a filler neck and a 5/16" out the bottom. You could literally hit the transfer pump while you are runnign down the road. And THAT would be worth the cost and inconvenience of dealing with 5-6 jugs. Too, that's another ~200# at the rear of the vehicle. Either way.
eta here's a guy that can build any tank, $400 starting price
www.aluminumgastanks.net
Too, I can envision a tank made to fill that spare tire area rectangle, with a (square?) 'donut hole' which fits around the spare tire winch mechanism, which could literalyl allow you to bolt in the tank to the existing vehicle framing and keep the spare right where it is at. A 3-4" tank at max width and length for the space would be at least 20gal. You'd have to change / modify the fuel filler location a little to fit two necks / caps. And plumb the transfer pump, which would be attached to the new tank. And a wiring kit
I just took mine out <2wks ago to change my fuel pump. If one had big tires and/or a big lift, it would be pretty straightfoward to put a 5-6" tall rectangular space and drop or duplicate the whole framing support for the standard spare tire mount below the added tank and double the fuel capacity of the vehicle.
I've already seen some dual tank mods on these vehicles where two filler necks / caps are fit behind the factory door. Fill them both, rig the secondary as a transfer tank with a hard-plumbed pump on a dash switch. Run down the stock tank and flip the switch to dump the other into it.
hmm I didnt' take any pics of that big space while I had the spare and fuel tank out...
There's steel intermediate plumbing in the fuel filler and primary vapor vent lines running from tank to filler. Be easy to re-work or tap into that section for transfer plumbing. Any muffler shop could weld a 1/4"-5/16" barbette onto that metal section, after you dismount it. and 12v fuel pumps are cheap -
Amazon.com: MOSTPLUS Universal Low Pressure Gas Diesel Inline Metal Solid Petrol 12V Heavy Duty Electric Fuel Pump Compatible with Motorcycle Carburetor ATV HEP-02A: Automotive
Buy MOSTPLUS Universal Low Pressure Gas Diesel Inline Metal Solid Petrol 12V Heavy Duty Electric Fuel Pump Compatible with Motorcycle Carburetor ATV HEP-02A: Electric Fuel Pumps - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
Cost a lot more than 5-6 20L jugs, but if you can fab much of it yourself you'd save a lot of the cost. Having a custom aluminum tank with some slosh baffles in it would be real nice, with a filler neck and a 5/16" out the bottom. You could literally hit the transfer pump while you are runnign down the road. And THAT would be worth the cost and inconvenience of dealing with 5-6 jugs. Too, that's another ~200# at the rear of the vehicle. Either way.
eta here's a guy that can build any tank, $400 starting price
Home
one-stop-shop for spun aluminum gas tanks, custom aluminum gas tanks, polished stainless steel gas tanks and gas tank accessories.
Too, I can envision a tank made to fill that spare tire area rectangle, with a (square?) 'donut hole' which fits around the spare tire winch mechanism, which could literalyl allow you to bolt in the tank to the existing vehicle framing and keep the spare right where it is at. A 3-4" tank at max width and length for the space would be at least 20gal. You'd have to change / modify the fuel filler location a little to fit two necks / caps. And plumb the transfer pump, which would be attached to the new tank. And a wiring kit
Last edited:
A f150 rear tank from 1996 fits perfectly between the rear frame above/where the spare tire is . I have pictures and details in my thread. https://www.expeditionportal.com/fo...t-living-suburban-build-thread.153444/page-16
The tire would be low for my tastes but it can be done. The place I stole the ideas from did it on an avalanche and they mounted the spare there. It was on another gm forum but I can't find the thread. I remember googling "avalanche auxilliary gas tank f150" or something similar. Edit: I remember there being better pictures but I think this is it:
www.chevyavalanchefanclub.com
The tire would be low for my tastes but it can be done. The place I stole the ideas from did it on an avalanche and they mounted the spare there. It was on another gm forum but I can't find the thread. I remember googling "avalanche auxilliary gas tank f150" or something similar. Edit: I remember there being better pictures but I think this is it:
back-up gas tank?
since I removed my spare tire I have been tring to think of something todo with the spare room underneath the bed. Is there anyway to rig a second smaller gas tank? I was thinking the more fuel I can hold the better. has anyone used that area for anything or know if its even possible for me to...
Last edited:
60beforetruck
Active member
I got my air tank today. Found a 3 gallon Firestone that fits like a glove. It is going to be mounted on the rear cross member behind the bumper. It tucks in there nicely and is protected by the hitch.
It even fits with the factory spare, which I am taking out anyway.
I didn't want to mount a tank on the outside of the frame rail because I might put sliders or electric steps on this truck. Had sliders on my duramax but, I dont think this truck will wheel as hard as that one did.
It even fits with the factory spare, which I am taking out anyway.
I didn't want to mount a tank on the outside of the frame rail because I might put sliders or electric steps on this truck. Had sliders on my duramax but, I dont think this truck will wheel as hard as that one did.
Attachments
60beforetruck
Active member
rayra
Expedition Leader
oh I like that. I was just fiddling with putting an air coupling in my rear bumper just to the right of the spare winch access cover. Was thinking a similar tank on the left frame rail below the filler. Wanting to put on-board air where the rear subwoofer is.
How long is that tank? Didn't think I could fit one between the hitch and spare.
Overlandtowater
Well-known member
LOL you still have the spare under it.....
60beforetruck
Active member
The tank I used is 20.75" Firestone has a handful of different sizes and fitting locations.
60beforetruck
Active member
For now, I need to finish my swing out tire carrier then I will remove it. A small share is better then no spare.
Overlandtowater
Well-known member
For some reason I thought the swing out was done. Yes small spare better than none
60beforetruck
Active member
I am working on the filler pieces on the bumper.
60beforetruck
Active member
Been a minuate. Summer on the lake then straight into deer season. Time to get back after it.
Original plan was to swap the LLY from my rolled truck into the suburban. That might still happen. I purchased a 07 Duramax today that needs some love. Thinking flat bed camper.
Thoughts on saleing my suburban?
Sale it as a duraburb?
Sale suburban and duramax as a package?
What you think?
Original plan was to swap the LLY from my rolled truck into the suburban. That might still happen. I purchased a 07 Duramax today that needs some love. Thinking flat bed camper.
Thoughts on saleing my suburban?
Sale it as a duraburb?
Sale suburban and duramax as a package?
What you think?
Well done Duraburbs can fetch a pretty penny, but of course then you’re waiting for the right buyer. I suppose you’d be waiting for the right buyer for a SAS Burb anyways though.
so you have a rolled and legless LLY still? How much would you sell that thing for if you don’t do Duraburb?
so you have a rolled and legless LLY still? How much would you sell that thing for if you don’t do Duraburb?