Frequently bought together
Description
This kit moves the gas cap out of the bed floor and into the taillight housing on a 1973–1991 Chevy or GMC squarebody. It's a hidden filler that still opens where you can reach it, and the panels are designed from 3D scan and CAD data so the shape follows the bed you already have.
Features
- CNC laser cut 18-gauge steel, pre-formed and shipped with the sides tacked in place as shown.
- Includes a polished 1.5" stainless steel fuel filler.
- Spring-loaded hinge assists with closing.
- Laser cut taillight mounting holes.
- Works with LED taillights or stock GM lights.
- Uncoated steel, ready to paint or powder coat.
Download and print the fuel filler template
Choose your option
- Driver side or passenger side.
- With or without a pair of LED taillights.
- With or without a gas filler delete panel, in 1973–78 or 1979–87 fitment.
Optional LED sequential tail lights
A direct replacement for your original tail light, made to fit squarebody Chevy trucks. Sold as a pair with the required LED turn signal flasher.
- Sequential operation with a brake-attention feature and an off switch.
- Comes with a special tail light mounting base plate.
- Electronics fully sealed in epoxy against corrosion and moisture.
- Suburban models require a modification to the internal bracket.
Optional gas filler delete
Our gas filler delete for 1973–78 and 1979–87 GM/Chevy trucks is a panel formed to fit exactly where the filler neck used to be. Weld it in to shave the gas filler hole on the driver side of the cab. Laser cut from 16-gauge steel.
Fitment notes
Taillights are not included unless you select them. The kit works with stock GM lights and LED taillights, but not LMC aftermarket lights. It may also not work with fuel nozzles that carry a vapor-sealing or pressure-seal device, as some states require — it's best used with standard nozzles.
Not included
- 1.5" ID fuel filler hose and clamps.
- The fuel tank and sending unit.
- LED taillights and the gas filler delete panel, unless you add them at the top of the page. The panels work with stock GM lights as they are.
- Paint or powder coat. The steel is uncoated on purpose so it is ready to finish.
Truck compatibility and specs
Fits these trucks
1973–1991
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
- 7387TLFF
- Brand
- LS Fabrication
- Interior / Exterior
- Exterior
- Material
- Aluminum Sheet Metal, Billet Aluminum, Stainless Steel
- Weight
- 2.1 kg
Fits alongside
Most often bought with this part:
Installation
Plan on extending the taillight wiring. A joiner tube isn't included because tank manufacturers vary — source fuel-grade line to join the filler spout to your tank, or fabricate a tube with rubber couplers on either end. The printable template and instructions are linked in the description.
LS Fabrication doesn't offer a hose or plumbing kit between the filler and the tank, so all plumbing design, routing and installation are the installer's responsibility. The kit doesn't provide tank venting either — your fuel tank needs its own adequate vent system, or you can end up with slow filling, splash-back or pump shutoff.
Reviews
Customer reviews
What owners are saying
23
Tail Light Fuel Filler Kit - 73-91 GMC Chevy Squarebody Truck
Common questions
Does the taillight fuel filler fit a stepside bed?
No. These kits are cut and formed for the fleetside (wideside) bed on the years listed, because the filler assembly mounts behind the bedside taillight panel that a stepside bed does not have. On a stepside the usual route is a bed floor or inside box panel filler instead. Send us a photo of your bed and we will tell you which one suits it before you order.
Does the kit come with taillights?
Not by default. The kit is the filler assembly, the polished 1.5" stainless filler neck, the roller bearing taillight hinge, the mounting hardware and the push magnet. LED taillights and reverse lights are an add-on option at the top of the page, sold as a pair with a flasher included. Your original housings and lenses bolt straight back onto the laser cut mounting holes if you would rather keep them.
What size fuel hose does the filler neck take?
The neck is 1.5" in diameter, so it takes 1.5" ID fuel filler hose and a matching hose clamp. Both are ordinary parts-store items. A tank with a side fill bung is the easiest thing to plumb it into.
Will it work with every gas pump?
It may not work with fuel nozzles that carry a vapour sealing device or pressure seal, which is what most California pumps use. Everywhere those nozzles are not mandated, the filler takes a normal nozzle. If the truck fills slowly after the install, the cause is almost always the routing of the fill hose rather than the neck itself - keep the run as short and as straight as you can and avoid a high loop that traps air.
How do I know it fits my truck?
This part is listed for 1973–1991 Chevy and GMC Blazer, C10, C1500, C20, C2500, 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.
Fun project.
Great product! It took quite a bit of fitting work, but the end result is excellent. Very good quality.
great product and customer service..