I'm looking at buying a 07-08 Silverado and would like to have a bigger gas tank in it (100 gallons or close). Does anybody know the best way to do this, even if it's not 100 gallons I just don't want to go to the gas station every day, but the more the better, even if it was another factory tank mounted on the passenger side to give me a total of about 50 gallons. I would prefeer one to go in between the fuel rails and not in the bed. Has anybody done this before, or seen somebody do it? Is the best thing just to call fuel safe and have them build a custom one?
Thanks,
James

There are several companies that sell you a replacement tank that goes exactly where the factory tank goes but with a higher volume. I have a crew cab 2500 DD with a 25-26 gallon tank that is a little on the small side (long bed version of the same truck gets another 10 +/- gallons). I looked into the replacement tanks but got used to getting fuel every 3-4 days instead. The tanks were only like $750 plus installation.

How much bigger were the tanks you found and what company made them. Thanks for the info.
James

I remember the ones I was looking at were only 45-48 gallons total. The best part was they were barely visible from the side (one hung down about 1 1/2 inches). Google auxillary fuel tanks GM, Ford, Dodge etc.

Try Transfer Flow. I had a pair of their tanks in my 2002 F-450 giving us a total of 80 gallons. I just swapped out the factory tank in my 2008 F-450 with on of their 60 gallon replacement tanks and again it was a direct bolt in. Their stuff fits and works perfectly.

www.transferflow.com

Here's another factory replacement option:

www.titanfueltanks.com/gm.html

I think the one for the 8ft bed is actually closer to 60 gallons. Sounds like TransferFlow is the best, but I have heard good things about these Titan ones too.

Thanks HotDuck great Site! Just called Transfer got a price of about $900 for my chevy diesel 56 gal direct replacement for factory tank.
3 week lead time though.
Quinlan

I didn't want to spend the money on Transfer flow, so I had a local alum welder build me a custom tank/toolbox. I would only recommend this with diesel fuel.

I had a fuel tank built that fits in the bed, and is flush with the top of the bed. The top 8 inches of the tank is a tool box with the fill neck inside the toolbox. The bottom of the tank has a 1/2" fitting. I drilled a 1" hole in the bed, installed a valve on the tank, and piped the fuel to the fillneck of the truck. You remove the fillneck easily, drill a hole in it, and have a welder weld a 1/2" collar in it. I have a valve from the tank, an in line filter, and drop directly into the fillneck.

The bed tank holds 75 gallons, and the truck holds 40 gallons. My fuel guage stays on full for 900 miles, and when it comes off of full, I know the gravity tank is empty, and have the factory tank to run on.
I drive 1000-1250 miles per week for work, and this was the best solution I could find. This tank has been installed in the last three trucks I have owned, and I will have one for as long as I have a diesel truck.

Total cost of tank in 1996 was 380.00. Made of alum diamond plate.

Also, before anyone says it, the gravity tank does not overflow out of the factory cap, but if you remove the factory fuel cap, the fuel is right there at the tip of the neck.

northern tool sells several different bed mount tanks. They are diesel only though.

http://www.northerntool.com/webapp/w...970_106+771280

I just ordered the 56 gal. midship replacement tank from transferflow for my 07 Dodge 3500 Mega-cab. Probally won't be here till after the new year but when i get it in i'll let everybody know how the install went.