Forum Discussion

mkirsch's avatar
mkirsch
Nomad II
May 16, 2023

Extended-range tank for Chevy 2500HD gas

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.
Tow Vehicles
  • monkey44's avatar
    monkey44
    Nomad II
    May 16, 2023
    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.
  • Latner's avatar
    Latner
    Nomad
    May 16, 2023
    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.
  • Grit_dog's avatar
    Grit_dog
    Navigator
    May 17, 2023
    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.
  • Bionic_Man's avatar
    Bionic_Man
    Explorer
    May 18, 2023
    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.
  • APT's avatar
    APT
    Explorer
    May 18, 2023
    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.
  • ZagiFlyer's avatar
    ZagiFlyer
    Explorer
    May 24, 2023
    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.
  • monkey44's avatar
    monkey44
    Nomad II
    May 25, 2023
    My 2015 Silverado 2500HD 6.0L SB 4x4 bought new came from factory with a single 36 gallon gas tank.

About Travel Trailer Group

44,029 PostsLatest Activity: Jan 13, 2025