Question for the exhaust pros out there..

[Jolly Roger]

ooooooooo,...I know....a second gas tank..

 

[wjburken]

ooooooooo,...I know....a second gas tank..

No, no, no..... a secret compartment for hiding treasure!

 

[kbuskill]

ooooooooo,...I know....a second gas tank..

Some of the 2500 Suburbans have an auxiliary fuel tank back there above the spare tire if my memory serves me... although the frames are different... James @swathdiver could tell you more.

 

[swathdiver]

Some of the 2500 Suburbans have an auxiliary fuel tank back there above the spare tire if my memory serves me... although the frames are different... James @swathdiver could tell you more.

The GMT900 2500s have an 11.5 gallon tank above the spare with its own fuel pump. They run a 26 gallon main tank, not 31.5 like the 1500 Suburbans. On our 1500s, it does not fit without modification and probable loss of the spare. I'd love to add that to my 31.5 for 42 gallons like the GMT400s. There's not as much space between our frame and body as the 2500s. Someday when I have more time and money I will investigate it further unless someone does it before I do, hopefully!

 

[kbuskill]

So there you go... you already are deleting the spare... now you just need a body lift and you should be able to stick that auxiliary fuel tank in there and be set.

 

[mountie]

IMO , Just replace the muffler in the OEM location...... The style muffler sound will be different enough....

Relocating the muffler is not going to change much. verses cost & hassle.

It's just a muffler and a tail pipe...... No need to over think it unless you try a dual exhaust.

 

[Jolly Roger]

Probably counter productive adding an extra tank. Id probably use more fuel toting around the extra gas lol.

 

[mountie]

Probably counter productive adding an extra tank. Id probably use more fuel toting around the extra gas lol.

Add a tank if you drive in Australia's OutBack. Or Texas ...

 

[TomC]

2018 Tahoe premier. I installed a carven muffler and removed the resonator. I kept the original cheome Chevy tip. We get no drone noise inside cab. It belong to wife, she loves it. Stays peaceful until you step on throttle. I do recommend to remove resonator.

 

[Jolly Roger]

Add a tank if you drive in Australia's OutBack. Or Texas ...

...Texas is puny compared to Alaska, I drive 800 miles just to get milk.