GMC General Truck Fuel Tanks

Frequently Asked Questions About GMC General Truck Fuel Tanks

What years and models are these fuel tanks compatible with?

Our GMC General truck fuel tanks are designed to fit GMC General models from 1977 to 1987. These tanks are direct replacements for both single and dual tank configurations. However, compatibility can vary based on wheelbase length and cab style. We recommend checking your truck's specific year, wheelbase measurement, and whether you have a standard or extended cab before ordering. If you're unsure, our customer service team can help verify fitment using your VIN number.

What material are these fuel tanks made from, and how do they compare to OEM?

Our replacement fuel tanks are manufactured from either high-grade aluminized steel or heavy-duty polyethylene plastic, depending on the model you choose. The steel tanks feature a corrosion-resistant coating that meets or exceeds OEM specifications. Poly tanks offer superior corrosion resistance and are lighter weight, though some customers prefer steel for its traditional durability. Both options include proper baffling to prevent fuel slosh and are pressure tested to ensure leak-free performance.

How difficult is the installation process, and what tools are required?

Installation typically takes 2-4 hours for someone with moderate mechanical experience. You'll need basic hand tools including socket wrenches, screwdrivers, and jack stands to safely support the vehicle. The most challenging part is usually disconnecting the old fuel lines and sender unit without damaging them. We strongly recommend draining the old tank completely before removal and having a helper available to support the tank during installation. New mounting straps and hardware are included, but you may need to reuse your existing fuel sending unit and pickup assembly.

What tank sizes are available, and how do I know which one I need?

GMC General trucks came with various tank sizes ranging from 16 to 40 gallons, depending on the configuration. Side-mounted tanks typically range from 16-20 gallons each for dual tank setups, while rear-mounted tanks can be 25-40 gallons. The size you need depends on your truck's original configuration and mounting location. Check your owner's manual or the tag on your existing tank for capacity information. Keep in mind that aftermarket auxiliary tanks may have slightly different capacities than OEM specifications.

Do these tanks come with sending units, straps, and other necessary components?

Most of our GMC General fuel tanks come with new mounting straps and hardware, but typically do not include the fuel sending unit, pickup tube, or fuel pump assembly. These components usually transfer from your old tank if they're in good working condition. We do offer complete tank kits that include new sending units, but these are sold separately. Always inspect your existing sending unit's condition before installation, as this is an ideal time to replace it if showing signs of wear or inaccurate fuel gauge readings.