Replace 31 gallon tank with 39 gallon tank from 2500 series Suburban?

[dictum]

Not too happy with the MPG/gas tank size in my 2013 Yukon XL. When it reads empty, I can only put in about 25g and it is a 31 gallon tank. Something is off.

Possible to swap in the bigger 39 gallon tank from the 2500-series into my 1500 Yukon Denali XL? What models carry the 39 gallon tank? what years of Silverado/Suburban/Yukon XL?
Can I assume the mount points are the same and can it work?

I also want to put in a newer fuel pump because this one has 200K on it and is original, to preempt failure.

 

[strutaeng]

Not too happy with the MPG/gas tank size in my 2013 Yukon XL. When it reads empty, I can only put in about 25g and it is a 31 gallon tank. Something is off.

Possible to swap in the bigger 39 gallon tank from the 2500-series into my 1500 Yukon Denali XL? What models carry the 39 gallon tank? what years of Silverado/Suburban/Yukon XL?
Can I assume the mount points are the same and can it work?

I also want to put in a newer fuel pump because this one has 200K on it and is original, to preempt failure.

The 2500 Suburbans have a dual tank setup (with a fuel pump/sender in each tank). The auxiliary tank is like 7 gallons, and main tank is 30 gallons(?)

The system is kinda more complicated because you have an extra relay for the auxiliary tank, there's extra wiring and it's tied into the cluster for the fuel level (via the Class 2 data bus system or whatever that thing is called?)

If you study the wiring diagrams, I'm sure it's possible to swap the dual tank setup. I can't remember if HP Tuners has any sort of settings to enable dual tanks on the ECU side of things...I can check.

 

[Doubeleive]

@swathdiver I believe that it was determined that the 2nd tank would not fit on a GMT900 1500 frame, the 2500's use the gmt800 frame
but just going off of memory, james should have more info

 

[dictum]

Is there an aftermarket single tank? You mean to tell me that 2500 Yukons /Burbs have dual tanks also? Is there a single 40-gallon tank in the GM lineup which would fit in the 2013 Yukon XL?

 

[Doubeleive]

Is there an aftermarket single tank? You mean to tell me that 2500 Yukons /Burbs have dual tanks also? Is there a single 40-gallon tank in the GM lineup which would fit in the 2013 Yukon XL?

Never heard of one, doesn't mean they don't exist though, with as many times as people have tried to even buy a new gas tank it would have came up by now.

 

[15burban]

Have you ever ran it completely empty and see how many gallons it takes to fill up? My mom had a mid 00's grand cherokee and although she didn't have live to far from her work (roughly 5 miles) she would drive that thing when it said 0 miles to empty for 2-3 days along with other errands.

Me, after 2-3 hours in any vehicle I need to get out, stretch my legs, and drain a different tank.

 

[Doubeleive]

once the low fuel light comes on you should be able to toogle thru the dic and find a menu that shows the remaining miles, run that down until it just says low then you should still have 3-4 miles. then fill it up. about the most mine has ever taken is close to 30 gal

 

[swathdiver]

Not too happy with the MPG/gas tank size in my 2013 Yukon XL. When it reads empty, I can only put in about 25g and it is a 31 gallon tank. Something is off.

Possible to swap in the bigger 39 gallon tank from the 2500-series into my 1500 Yukon Denali XL? What models carry the 39 gallon tank? what years of Silverado/Suburban/Yukon XL?
Can I assume the mount points are the same and can it work?

I also want to put in a newer fuel pump because this one has 200K on it and is original, to preempt failure.

My fuel sender is like yours, I can drive all day when it says empty. Typical fills are 25-26 gallons, most ever was just under 30.

The 2500s have a deeper frame, they run a 26 gallon tank up front and an 11 and change gallon tank above the spare tire. It's too big to put in our 2500s without removing the spare and crossmember, not to mention the complex computer programming to get everything working as it should.

Gasoline fuel tanks are considered part of the emissions system now and the aftermarket won't touch it with a ten foot pole because of the feds.

Some company made a round fuel tank that took the place of the spare but getting that fuel into the main tank was cumbersome.

The GMT400s had a 42 gallon tank behind the rear axle, their spare rode in the back of the truck.

On the highway my truck burns about 4-5 gallons per hour between 70-80 mph. That's over 7 hours at the slower speed and just shy of six hours at the faster speed. We routinely run about 450 miles on a tank using 25 gallons. Furthest I've run on 27 gallons was 515 miles. She can go further than I or my passengers can endure. That reality caused me to abandon my quest for more capacity. If I really need more capacity, I've got six 5 gallon Wavian Jerry cans that can go in the back and won't stink up the interior.

With VVT, your truck ought to be more fuel efficient than mine by a solid 1 mile per gallon.

 

[petethepug]

My 09 Esky had the same issue. The cure was replacing the fuel pump, sender, carbon canister and the evap module along with blowing all the loose carbon pellets from the lines and wiping them from the tank when it was out.

It now fills up to 31 gal when the gauge says it’s at its lowest without clicking off at the nozzle.

I looked into a bigger tank for our 1/2 T chassis because I run e85. It slightly decreases milage. There’s no larger capacity tanks currently made for our chassis.

I looked into the dual tank set up the 3/4 & 1T trucks but there’s a space confinement issue that can not be resolved. I can say that getting the fuel sender fixed and the ability to fill up the tank all the way did resolve a lot of milage issue.

 

[strutaeng]

Yeah, I was going to say look into the GMT 400 suburban tank that had the spare tire inside the trunk. But I don't know if those would work with the newer fuel pump assemblies?

Otherwise maybe a truck fuel tank that had more capacity? Again, the spare tire would need to be removed to make room for it. Usually on the trucks the long beds (8') had the largest fuel capacity offered. But agree, those trucks are usually the 2500HD trucks. Maybe a 1500 extended cab 8' bed truck fuel tank?

 

[petethepug]

Finally found the info on the GMT 900 dual tank set up for a 2011 6.0L L96 1T truck. This is also the same info as the 3/4T Suburban, Whoa …. Lotta info

https://www.justanswer.com/chevy/crzdg-chevy-3500-6-0-liter-gas-dual-tanks.html

 

[rjdjbd]

Not too happy with the MPG/gas tank size in my 2013 Yukon XL. When it reads empty, I can only put in about 25g and it is a 31 gallon tank. Something is off.

Possible to swap in the bigger 39 gallon tank from the 2500-series into my 1500 Yukon Denali XL? What models carry the 39 gallon tank? what years of Silverado/Suburban/Yukon XL?
Can I assume the mount points are the same and can it work?

I also want to put in a newer fuel pump because this one has 200K on it and is original, to preempt failure.

You might contact TransferFlow and see what assistance they could offer you… other products might be available other than what’s listed on their website.

Home

www.transferflow.com

 

[petethepug]

I gave them a ring about 2 years ago. Ty for the link. They can manufacture or make almost anything however, they’re not allowed to sell it. Kinda like prohibition on booze, but for gas tanks.

They suggested having a shop custom make one as the only option. He said most shops wouldn’t accept the liability though.

 

[Just Fishing]

Years ago I thought about taking a boat fuel tank and mounting it in the back of my blazer.
From there I could just pipe in a fuel line and a fuel pump to add fuel down the filler neck.

options would be to bag the tank and run a remote vent to prevent fumes...
In the end I just made a hitch carrier and mounted some Jerry cans to it.
Now for the tahoe, I have an actual hitch carrier.

My Jeep, I bought a rear bumper that has jerry can mounts built in.


My blazer had terrible range, it nearly got me in some trouble once...
Same area as where I own a few acres now, with the Tahoe I can top off at the last stop and get there with 3/4 of a tank.
Then I need half of that to get home or top off at the same pos out in the middle of nowhere place that says it's premium, but the Tahoe disagrees.

Yeah, I'm good with as little gas as possible from that place.



I love the Jeeps setup, I want it on my Tahoe, a back bumper to carry a full-size spare, and or gas cans.

 

[petethepug]

I sputtered into Gila Bend when coming out of NM from AZ. A long âss strip of desert that will get you stuck in the sand if you pull off the road and no cell signal.

Never so happy in all my life to see that truck stop pop up on the drive from TX to SoCal. Our trucks tank holds 31 gal and when your fuel sender is working like it should it keeps you outta trouble.

Most of our 07-14 truck are coming due for the first time to replace the fuel pump & sender. The poor folks who install all those overseas counterfeit parts the first time are really screwed because the junk pumps slowly die after 12-18 Mo’s and owners expect its something else.

It’s common on the 12-14 Escalade Premium & Platinum trim to have no spare tire. They had the dual exhaust option that took its place. I’d give up my spare for a larger or 2nd tank even if it was only 8-12 gal.

 

[dictum]

My fuel sender is like yours, I can drive all day when it says empty. Typical fills are 25-26 gallons, most ever was just under 30.

The 2500s have a deeper frame, they run a 26 gallon tank up front and an 11 and change gallon tank above the spare tire. It's too big to put in our 2500s without removing the spare and crossmember, not to mention the complex computer programming to get everything working as it should.

Gasoline fuel tanks are considered part of the emissions system now and the aftermarket won't touch it with a ten foot pole because of the feds.

Some company made a round fuel tank that took the place of the spare but getting that fuel into the main tank was cumbersome.

The GMT400s had a 42 gallon tank behind the rear axle, their spare rode in the back of the truck.

On the highway my truck burns about 4-5 gallons per hour between 70-80 mph. That's over 7 hours at the slower speed and just shy of six hours at the faster speed. We routinely run about 450 miles on a tank using 25 gallons. Furthest I've run on 27 gallons was 515 miles. She can go further than I or my passengers can endure. That reality caused me to abandon my quest for more capacity. If I really need more capacity, I've got six 5 gallon Wavian Jerry cans that can go in the back and won't stink up the interior.

With VVT, your truck ought to be more fuel efficient than mine by a solid 1 mile per gallon.

Thanks for the definitive reply. Maybe I should leave it as is. All the viable solutions are not cost-effective, short of getting a 2500 series Suburban (which comes with the 6.0L versus 6.2L).

The remaining question is, how do I caliberate the gauge gauge to correctly read empty when it really is empty. I have never put more than 26 gallons in it, even when the gauge dips below the horizonal line and looks scary like it will stall any second now.

Do I need a different fuel pump? Or some other device along the way to the gauge?

Actually an interesting idea would be to install an aftermarket gas gauge, how hard / expensive would that be? The default one positively sucks. It's the size of the half-dollar and doesn't show any granularity.

 

[swathdiver]

Thanks for the definitive reply. Maybe I should leave it as is. All the viable solutions are not cost-effective, short of getting a 2500 series Suburban (which comes with the 6.0L versus 6.2L).

The remaining question is, how do I caliberate the gauge gauge to correctly read empty when it really is empty. I have never put more than 26 gallons in it, even when the gauge dips below the horizonal line and looks scary like it will stall any second now.

Do I need a different fuel pump? Or some other device along the way to the gauge?

Actually an interesting idea would be to install an aftermarket gas gauge, how hard / expensive would that be? The default one positively sucks. It's the size of the half-dollar and doesn't show any granularity.

I know people who used to bend the fuel level wire on the float to adjust how they read. I don't get more than 26 gallons unless I really run it down.

When the light comes on, if I fuel up right away, it will take high 24s or up to mid 25s for fuel. Drive for an hour afterwards and she goes 26-27 gallons. Like tomorrow!

Light came on when I left the house tonight, drove 36 miles to dinner and back and will refuel later today.

I reckon the longer tank spreads the fuel out making our useful capacity not much more than the 26 gallon guys. My kids have 26 gallon tanks in their pickups and always put 25-26 gallons in them.

When the tanks are this low, the fuel float can read 0% and move around to 8-11% but the pump is submerged in a bath of fuel regardless.

The Tech-2 can show you the fuel pumps Long Term Trim which I guess is a condition of its health. Last time I checked mine, it was moving up a down a couple of points but has steadily gotten higher over the years. It's much higher than my pickup which just turned 110K miles. I have a brand new unit with all the trimmings sitting on the shelf for when I'm ready to change or it gives up the ghost. Still holds fuel pressure while driving at 42-44 psi.

 

[swathdiver]

Pumped aboard 28.3 gallons just now, Torque Pro app showed 92% full when driving. Usually shows in the 80s with a 25 gallon fill. That was 44 miles of additional driving since the light came on last evening. It's consistent and predictable.

 

[dictum]

what is Tech-2?

 

[dictum]

Pumped aboard 28.3 gallons just now, Torque Pro app showed 92% full when driving. Usually shows in the 80s with a 25 gallon fill. That was 44 miles of additional driving since the light came on last evening. It's consistent and predictable.

So the good thing is, it has a very generous reserve.