Higher capacity fuel tank??

[Elbow Joe]

I’m looking at the possibility of replacing the puny 24 gallon fuel tank on my ‘21 Silverado crew cab. I think GM really missed the mark when they decided on this size tank as the only option. I understand this is an EPA-based decision, but Ford and Ram both offer extended tanks as an option. I’m tired of filling so frequently . The only solution I can come up with is to buy an aftermarket diesel tank (offered in 43 ga capacity) and swap out the factory tank. Anyone had any experience in such a mod or have any suggestions??

[BlancoSilverado]

That is what i was thinking about with the 5.3L, Titan fuel tanks has the 43 gallon tanks but they do not list them for the gas models. I talked to them last year at SEMA and they said that its only for the diesel fuel because the exhaust on the gas models are too close to the tank and it could possibly melt the tank.  I am not sure if i believe that, the diesel already has incredible range, why does it need even more. 

[Elbow Joe]

24 ga is simply too small. I heard from an engineer that this was to keep weight down on the vehicle to maximize fuel efficiency during EPA testing. It’s no secret that OEMs are putting options on vehicles such as start/stop, cylinder deactivation, E-assist, turbo 4 cylinders, etc for one purpose only. It’s so they can be driven in a manner that no one in the real world drives like to maximize the EPA test results. I still don’t understand why any “optional” or aftermarket companies are not designing gas tanks that can provide customers with the ability to minimize their need for fill ups…. I thought the diesel tank “retrofit” would be a popular work around. 

[diyer2]

Not a big market would be my guess why no one is making them. 

[lennybg]

26 minutes ago, diyer2 said:

Not a big market would be my guess why no one is making them. 

Winner Winner Chicken Dinner

[Elbow Joe]

So, if that were true, that would mean that there is a large enough market for Titan to offer an oversized diesel tank for these trucks sold with a diesel engine, but not large enough to offer a gas version for the same truck…. According to DOT sales figures, only 13% of light truck sales are diesel, so I think something else is at play here.

Edited December 13, 2023 by Elbow Joe

[Elbow Joe]

Leave it to the Aussies! Too bad shipping would be an issue to those of us in the U.S. 

 

https://longrangeautomotive.com.au/Chevrolet-Silverado-1500-Petrol-Dual-Cab-190L-Replacement~25665#UORe0njfdRgu1aP9RxNV19wMTAxMTE

 

 

[Bikerjon]

Search the forum, This has been thoroughly discussed, contemplated and dismissed as not feasible. Anything is possible but somethings are not worth the time and/or money. 

[Elbow Joe]

Interesting comment. I tried searching this forum before posting initially but found very little on the subject which is why I posted in the first place. I’m curious why you state it was “dismissed as not feasible”. Seems totally feasible to me if a aftermarket company offers a larger fuel tank for the same truck which is diesel powered and whose numbers are a fraction of the gas powered counterparts…. What am I missing Bikerjon? Who wouldn’t want the ability to go 600+ miles between fuel stops as opposed 380 or so?

[Transient]

15 hours ago, BlancoSilverado said:

That is what i was thinking about with the 5.3L, Titan fuel tanks has the 43 gallon tanks but they do not list them for the gas models. I talked to them last year at SEMA and they said that its only for the diesel fuel because the exhaust on the gas models are too close to the tank and it could possibly melt the tank.  I am not sure if i believe that, the diesel already has incredible range, why does it need even more. 

It's bullshit.  Exhaust and gas tank have the driveshaft between them on all models, including diesel.  Worst case scenario involves the addition of a heat shield.

Edited December 14, 2023 by Transient

[Bikerjon]

19 hours ago, Elbow Joe said:

Interesting comment. I tried searching this forum before posting initially but found very little on the subject which is why I posted in the first place. I’m curious why you state it was “dismissed as not feasible”. Seems totally feasible to me if a aftermarket company offers a larger fuel tank for the same truck which is diesel powered and whose numbers are a fraction of the gas powered counterparts…. What am I missing Bikerjon? Who wouldn’t want the ability to go 600+ miles between fuel stops as opposed 380 or so?

OK Joe. First of all let me state that I was just trying to be helpful. I would like to have a bigger gas tank on my truck also. So first of all the EPA does have some of the blame for a 24 gallon tank because the fuel tank is considered a component of the emission control system (evaporative emissions). GM, Titan or your local welding shop does not want anything to do with certifying a larger fuel tank with the EPA, NHTSA and god knows who else to make that fuel tank street legal and "approved for on road usage" in our overly litigious society. Imagine getting into an accident and have your cobbled together fuel tank split, leak or explode. JD Power says 1 gallon of gasoline weighs 6lbs. 20 gallons X 6lbs.=120lbs. That doesn't seem like a lot of weight but it is when you are trying to achieve 45 MPG Corporate Average Fuel Economy under heavy pressure from the Federal Government. I did state "not feasible". I did not state impossible.

I hope you are able to stuff a bigger tank under your truck. I just dont think its very feasible.

[diyer2]

Not a big deal to me. I fill up at 1/2 tank, so our daily driver that's about every 200 miles.

[64BAwagon]

The cost is prohibitive for an oversized gas tank. The rules are different than with the diesel. 

I carry a 6 gallon (the maximum allowed portable tank) in the bed of my truck when we are traveling. 

I keep it strapped in the bed just next to the fuel fill. I use this pump. Works on 4 AA batteries and has auto shutoff. When its not in my truck I use it for my lawn tractor and generators. https://www.northerntool.com/products/terapump-gas-can-transfer-pump-flow-2-4-gpm-hose-length-3-25-ft-battery-size-aa-model-trfa01-4880869   ^ gallon jug and pump for less than $100 

[lowrider]

What about the Long Bed Tank - 28Gals.

 

Lou

[Transient]

I don't know why, but seeing this thread title again reminded me of when I was filling the tank in San Diego (where I moved from in July).  The pumps were shutting off automatically at $125.  With gas over $6/gallon that's a little more then 3/4 tank.  If you had a larger fuel tank you'd need to swipe your card again at the pump to fill it up the rest of the way.  Just another reason to keep smaller fuel tanks.