If there's one downside to modern HD diesel trucks that we've found, it would have to be the painfully low capacity fuel tanks. Sure, some manufacturers have offered upgraded tanks over the years; however, the vast majority of them have remained smaller than their gasoline counterparts. Current-generation trucks have given up space to accommodate the diesel exhaust fluid tank, and older diesels, such as our 2002 Chevrolet Silverado 2500HD, only offered small volume tanks. Thankfully, the good folks at Titan Fuel Tanks have a solution for nearly every truck's fueling needs, from extra-large underbed storage to in-bed transfer tanks, and even custom auxiliary tanks.
Speaking of our 2002 Silverado 2500HD, it arrived from the factory with only a 26-gallon fuel tank. It was painfully small for our intended use for the truck. So, we gave Titan a ring and ordered up the company's 52-gallon replacement underbed tank (extended-cab, short-bed trucks can fit a 39-gallon tank and crew-cab, long-bed; trucks get a 62-gallon replacement).
Titan's Super Series XXL replacement tanks are constructed of heavy-duty crosslinked polyethylene and arrive complete with a powder-coated crossmember support bracket, steel strap set, rubber bushings, and vent hoses with rollover safety valves.
Some trucks, such as our LB7-equipped 2002, require additional hardware to mount the fuel sending unit. The tank for our application was only 2 inches deeper than the factory tank and hung down only one extra inch below where the factory tank shield was. Titan constructs its tanks right here in the United States, and it offers a limited lifetime warranty.
Installation is fairly easy and can be done in the driveway. An extra set of hands and a couple good floor jacks are a necessity. Titan has heard of people swapping their tank in less than an hour, but in our experience, it's going to be best to plan a full day for when things get tricky. While it's not necessary to remove the truck's bed for this install, we did for ease of access and photography.