Extended-range tank for Chevy 2500HD gas

[mkirsch]

With my 2015 Chevy 1500 being down, I have been driving my Dad's 2015 2500HD.

Pretty sure the stock fuel tank on the 2500HD is 34 gallons.

It takes 20 gallons to fill it at 1/2 tank, AND the fuel tank looks like it's hanging down lower than I think it should, which has me wondering if it has an aftermarket extended-range tank on it.

Of course I'll chalk it up to my overactive imagination if nobody ever made an extended-range tank for these.

So, did anyone make an extended tank for the 2015 Chevy 2500HD gas? Yes, I have checked google and Titan's website.

[Grit_dog]

You ever solve this great mystery mkirsch?

[monkey44]

My 2015 Silverado 2500HD 6.0L SB 4x4 bought new came from factory with a single 36 gallon gas tank.

[ZagiFlyer]

I have a 2500HD with a standard bed (6 1/2 ft) and it has a 26 gallon tank. I know the long beds come with larger tanks. I also know that the aftermarket larger fuel tanks for standard beds hang down below the frame rail (which is why I don't have one).

So . . . if the truck in question is a standard bed then you probably have an aftermarket tank. If it's a long bed then you probably have the stock tank.

[APT]

The stock tank is 36 gallons so about half at 20 gal seems right. Most of my vehicles fuel gauges are not linear meaning at half a tank indicated is less than half tank left. Nothing to worry about running it full.

[Bionic_Man]

It is pretty unusual to find an extended run tank for gas.

FWIW, both my RAM and my Grand Cherokee run further on the top half of the tank than the bottom.

[Grit_dog]

Crazy idea, but couldn’t you find out by running it down near empty and presume the gas gauge is correct if you’re putting 30+ gallons in it compared to 40-50+ if an aftermarket tank?
Hell, you could carry a jerry can and just try to run it dry if it’s really a need to know scenario.

[Latner]

I don't know all the specifics, but the reason for 36 gallon tank and nothing larger has to do with Vapor emissions regulations, it gets pretty expensive to get them certified.

[monkey44]

We drove a Chevy 2015 2500HD SB gasser for years, hauling our truck camper. Bought new, no added tank. Stock tank - 36 gallons.

The GM - 1500's sit too low to the ground for a tank larger than 26 gallons. I drove one for years, and tried to find a A/M larger tank, but nothing for gassers, only larger tanks for diesel fuel and mostly in the truck bed.