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2020+ T1 Chevrolet/GMC HD Quick Reference Guide

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I know this is old but mine is LT 2500 crew std box and indeed has 36 gal tank...

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On 9/8/2019 at 9:51 AM, Gecko50 said:

I can not believe that the diesel tanks are 28 gallons for a long bed dually? wow why not the larger tank? I guess those aftermarket tank companies will be making some money.


In the dually, only the reg cab has the 28. Crew dually and double dually get the 36.

Perhaps because the def tank how has to live by the fuel tank, since it isn't under the passenger door anymore. 


Fuel tank size seems to be impacted by both cab length and box length as well as presence of def tank.


Perhaps someone at GM likely figured out that most long distance duallys ran with either double or crew cab -- and both of those have 36 gallon?

Highest tow capacity is the reg cab dually -- are they used more for 'local' work with infrequent longer trips? 


I'm sure there are some that will want to have reg cab and tow long distances that will add additional fuel capacity -- but some would do that even if they were all 36 gallon (or more). 


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Just tried to install 9005 high beams in my 21 3500 wt drw and they didn't work.  H9 were the bulbs installed.

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