Frequently bought together
Description
Shaving the gas filler out of the driver side of a 1955–1966 GMC or Chevy cab normally means templating, cutting and forming your own patch. This panel comes formed to fit where the filler neck was, so it drops into the hole and gets welded in.
Features
- Laser cut from 16 gauge steel.
- Formed to fit the area the factory gas filler neck occupied.
- Welds in to give the cab side a clean, filler-free look.
- Saves you the time of templating, cutting and forming a piece yourself.
Truck compatibility and specs
Fits these trucks
1955–1966
Not sure this is the right part for your truck? Send us your year, make and model and we will confirm the fit before you order. Not sure what year your truck is? Decode its VIN.
Specifications
- Part number
- 5566GFD
- Material
- Aluminum Sheet Metal
- Brand
- LS Fabrication
- Interior / Exterior
- Exterior
- Weight
- 0.05 kg
Fits alongside
Most often bought with this part:
Installation
This piece is intended to be welded in. It is a straightforward job for a do-it-yourselfer working at home.
Reviews
Customer reviews
What owners are saying
14

Common questions
Will it drop straight into my bed?
Expect to modify the base slightly. The panel is built to cover a range of years, and no two beds underneath it are the same - a 67-72 floor, a 73-87 floor, a wood floor and a floor with a spray-in liner all sit at different heights. That is why the part ships in raw steel, pre-formed and only tacked together, so you can adjust it to your own bed before it goes in for good.
Can it be welded in, or does it screw in?
Either. Weld it in for a seamless finish, or screw it in using the supplied stainless hardware and the three tapered mounting holes in the flange. Customers have also riveted and bonded them in. The choice is yours.
What are the filler neck dimensions?
Flange diameter 2-15/16", neck diameter 1-1/2", neck length 2-1/4". A universal fill tube joins the neck to the tank, and a side fill tank in 1.5" is the simplest thing to run it into.
Is it sealed against water?
The flip-up cap closes onto the neck face and the retaining chain keeps the cap with the truck, but this is a fuel filler, not a watertight hatch. Anything mounted in a bed floor will see water sitting on it, so seal the panel to the floor when you fit it and treat the cap as a fuel cap rather than a gasketed lid.
How do I know it fits my truck?
This part is listed for 1955–1966 Chevy and GMC 3100, 3600, 3800, C10, C20, C30 and others. The full year, make and model list is in the Truck Compatibility tab on this page. If your truck has been modified, or you are between two of the year ranges we list, send us the year, make and model and we will confirm the fit before you order rather than after.
How long before it ships?
It is a stock item and leaves our warehouse in 1-3 business days. Transit after that is typically 2-5 business days in the United States. Larger orders can arrive in more than one box on different days.
Still not sure? Contact us before you order.























Fit perfectly, tacked in place nicely, 10/10 satisfied
seems well made, thank you!
Great service. Quick delivery ,thanks
It is absolutely perfect!