2006 Duramax Spare Gas Tank

[JSCrane]

Is it possible to mount a larger gas tank on a 4 door GMC Duramax? The stock 25 gallon tank is not suffieicent for my current driving conditions. Any suggestions or tips would be appreciated. Thanks.

[Duramaster]

The reason why you only have a 25 gallon tank is because of the bed length. Try looking here www.transferflow.com/ :)

[NutNbutGMC]

There's also an underbed / center frame mounted 45 gallon tank. It's here somewhere.

Same site as above.

http://www.transferflow.com/gm_tanks_0.html