Larger gas tank

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Toy Tow Denali

TYF Newbie
Joined
Jul 18, 2023
Posts
10
Reaction score
4
We have towed with our Denali for some time and have to stop frequently to fill the gas tank. Does anyone know of a way or company that can install a larger tank?

Thanks!
 

Polo08816

Full Access Member
Joined
Aug 24, 2010
Posts
760
Reaction score
312
The issue is the approval process for gasoline tanks. It's not that big of a challenge on diesel tanks.

Do you have a Yukon or Yukon XL? This is one of the reasons we would opt for a XL. Also, GM made the standard length longer to the point where you might a well just get an XL.
 
OP
OP
T

Toy Tow Denali

TYF Newbie
Joined
Jul 18, 2023
Posts
10
Reaction score
4
No, we have the regular Yukon, although at least 6-12 inches longer than our 2015. The XL would not fit in our garage.
 

Polo08816

Full Access Member
Joined
Aug 24, 2010
Posts
760
Reaction score
312
We have towed with our Denali for some time and have to stop frequently to fill the gas tank. Does anyone know of a way or company that can install a larger tank?

Thanks!

The other green fuel motor choice would be your friend here. I go 2 weeks on a tank of fuel and I'm out and about every day....

But he tows, and the baby Duramax sucks down DEF while towing. There's quite a few threads about DEF usage in the Duramax sub-forum.
 

Stbentoak

Full Access Member
Joined
Jul 20, 2020
Posts
1,648
Reaction score
1,861
Even if he used a 2.5-gallon container every thousand miles which I don't believe is realistic, the increase in mileage of the Duramax (+30% min..) combined with the fact that he's probably feeding a 6.2 with premium still makes the Duramax a far and away winner. I haven't put 60.00 of DEF in mine in 3.5 Years.....Not to mention the fact that he doesn't tow ALL the time with it.....


Right now, in our area Diesel is 3.35 and Premium is 4.49. I mean a 2.5 container at Walmart is about nine bucks and it's even cheaper if you fill up at dispensers, which is what I would do if I was seriously towing....
 

Polo08816

Full Access Member
Joined
Aug 24, 2010
Posts
760
Reaction score
312
But he tows, and the baby Duramax sucks down DEF while towing. There's quite a few threads about DEF usage in the Duramax sub-forum.

Even if he used a 2.5-gallon container every thousand miles which I don't believe is realistic, the increase in mileage of the Duramax (+30% min..) combined with the fact that he's probably feeding a 6.2 with premium still makes the Duramax a far and away winner. I haven't put 60.00 of DEF in mine in 3.5 Years.....Not to mention the fact that he doesn't tow ALL the time with it.....


Right now, in our area Diesel is 3.35 and Premium is 4.49. I mean a 2.5 container at Walmart is about nine bucks and it's even cheaper if you fill up at dispensers, which is what I would do if I was seriously towing....

I think people often underestimate how much DEF they actually use when the vehicle is actually loaded.

Also, I'm just not that concerned about fuel cost when you're 1. buying a 1/2 ton based SUV and 2. already spending > $70k on an SUV.

But if you were concerned:

I'd gladly pay that additional fuel cost for the simplicity of a naturally aspirated V8 compared to the out of warranty repair costs on a diesel powertrain.

Ford does it right with a 36 gallon fuel tank on the F150. Not sure what GM was thinking with the 24 gallon fuel tank on their 1500s.

The only scenario in which I would opt for a turbodiesel is usually in the case of towing heavy beyond what a 1/2 ton is realistically capable of. It's the exhaust braking feature of the turbodiesels in HDs. I haven't been convinced that the exhaust braking feature is substantial in the baby Duramax powertrains.

1726620522530.png
 

Ct Pirate

Supporting Member
Joined
Nov 29, 2017
Posts
97
Reaction score
34
I have an XL and the "baby gas tank" is driving me nuts!! I mean I'm at an avg of 380 miles that I'm getting out of a full tank of 27/28 gallons. I mean the truck has more open space under it than a school bus. :rolleyes:
 

DontTaseMeBro

Full Access Member
Joined
Feb 9, 2024
Posts
198
Reaction score
129
I have an XL and the "baby gas tank" is driving me nuts!! I mean I'm at an avg of 380 miles that I'm getting out of a full tank of 27/28 gallons. I mean the truck has more open space under it than a school bus. :rolleyes:
I made the mistake once by buying the standard wheel base Expedition back in 2019. Towed a 4500lb single axle camper to Yellowstone and it couldn’t even go 200 miles before we had to stop and fill up thanks to the puny 24 gallon tank it had. Granted, 28 gallons in the Expedition Max or Yukon XL isn't that much more, but it’ll get ya another 40-50 miles down the road.
 
Last edited:

Forum statistics

Threads
132,087
Posts
1,862,135
Members
96,554
Latest member
eod_tech

Latest posts

Top