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Zac Davidson
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Zac Davidson Enthusiast

Zac Davidson

Posted
Posted

Hello,

 

I just got the GMC Sierra AT4 2500HD online it says 36 gallon gas tank, I went to fill up today for the first time because I was getting close to empty and it took 25 gallons. Does anyone know if the 2500s actually have the standard 28 gallon tanks and not 36 like advertised?

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redwngr
redwngr

All HD AT4's (and denali's) are crew cabs.   All HD crews have 36 gallon tank (cab and chassis trucks excepted)   HD Double cab std box diesels are 29, gassers 36. DC long box are

Crazy Canuck
Crazy Canuck

I feel if he hasn't figured it out in the 6 years since he posted it, he probably never will lol

sdelam
sdelam

My 2500 CCSB Denali Dmax has a 36 gal.  

Ryno12 Enthusiast

Ryno12

Posted
Posted

My CCSB 2500 gas also has a 36 gal tank.

How close to empty were you? Was the gas light on?

Pastusak.t Enthusiast

Pastusak.t

Posted
Posted

I have a previous gen but it’s still 36 gallons and if I’m bone dry (driving with the light on for 15-20 miles) it’ll still only take 31 gallons. So could be that you just filled up before it was empty. Just a thought.

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redwngr Senior Enthusiast

redwngr

Posted
Posted (edited)

All HD AT4's (and denali's) are crew cabs.

 

All HD crews have 36 gallon tank (cab and chassis trucks excepted)

 

HD Double cab std box diesels are 29, gassers 36. DC long box are 36.

 

HD Reg cab gasser = 36, diesel = 28

 

I'm surprised they have both a 28 and a 29 in the system.

 

I've put 132 litres in my 2018, (which is also supposed to be a 36 gallon tank).

That's 34.8 usgal. 

I don't make a habit of that, but am often at 128 to 130 litres (about 34 usgal)

Estimated range screen changes from a number to a 'range low' message somewhere in the 50 miles remaining range. :driving:

Edited by redwngr
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Zac Davidson Enthusiast

Zac Davidson

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Posted
8 hours ago, Ryno12 said:

My CCSB 2500 gas also has a 36 gal tank.

How close to empty were you? Was the gas light on?

Well to be fair it said I had 109 miles left so I guess not to empty...I’ll wait longer next time

Zac Davidson Enthusiast

Zac Davidson

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  • Author
Posted
3 hours ago, redwngr said:

All HD AT4's (and denali's) are crew cabs.

 

All HD crews have 36 gallon tank (cab and chassis trucks excepted)

 

HD Double cab std box diesels are 29, gassers 36. DC long box are 36.

 

HD Reg cab gasser = 36, diesel = 28

 

I'm surprised they have both a 28 and a 29 in the system.

 

I've put 132 litres in my 2018, (which is also supposed to be a 36 gallon tank).

That's 34.8 usgal. 

I don't make a habit of that, but am often at 128 to 130 litres (about 34 usgal)

Estimated range screen changes from a number to a 'range low' message somewhere in the 50 miles remaining range. :driving:

Thank you for this

SkidooSteve12 Enthusiast

SkidooSteve12

Posted
Posted

I've put 32.93 gallons of gas in my 2020 and low fuel light on and I think it said Range Low. Pretty nice to be able to run that long on a tank compared to my old 1500.

Ryno12 Enthusiast

Ryno12

Posted
Posted
Well to be fair it said I had 109 miles left so I guess not to empty...I’ll wait longer next time

That’s about right then for a 36 gal tank. I’m currently showing 117 miles left with just under a quarter tank on the gauge.
Quarter tank=9 gallons
Zac Davidson Enthusiast

Zac Davidson

Posted
  • Author
Posted
  • 6.6 Gas L8T, All Box/Cab Configurations: 36 Gallons
  • 6.6 Diesel L5P Double Cab Long Box/Crew Cab Standard and Long Box Configurations: 36 Gallons.  
  • 6.6 Diesel L5P Double Cab Standard Box Configuration: 29 Gallons.
  • 6.6 Diesel L5P Regular Cab Long Box Configuration: 28 Gallons.

 

I have a 6.6 Diesel standard box At4 2500HD

what are the differences here;

crew cab?

double cab?

regular cab?

Ryno12 Enthusiast

Ryno12

Posted
Posted
  • 6.6 Gas L8T, All Box/Cab Configurations: 36 Gallons
  • 6.6 Diesel L5P Double Cab Long Box/Crew Cab Standard and Long Box Configurations: 36 Gallons.  
  • 6.6 Diesel L5P Double Cab Standard Box Configuration: 29 Gallons.
  • 6.6 Diesel L5P Regular Cab Long Box Configuration: 28 Gallons.
 
I have a 6.6 Diesel standard box At4 2500HD
what are the differences here;
crew cab?
double cab?
regular cab?


Are you asking what the differences are between the CC, DC, & RC?
SkidooSteve12 Enthusiast

SkidooSteve12

Posted
Posted

I think he's asking how the gas tanks are designed to fit the different cab/box configurations? I'm assuming the gas tanks are just molded to fit in the most available spaces on those trucks, and still be able to be removable for service.

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