Congratulations on your purchase of the Hidden Tail Light Fuel Filler for your C10 truck.

Installation Video

Install Steps

1. Prep and weld. The kit requires welding down both sides prior to install, plus drilled holes for the magnet placement, taillight mounting points, and fuel cap.
2. Cut the taillight pocket. Once the kit is complete, cut the inner tabs in the taillight pocket.
3. Mark the cut line. Measure 1.5″ from the bottom of the half circle inside the reverse light pocket — this is the top of the cut.
4. Cut down. Cut straight down on the left and right side all the way down, and remove part of the seal. Two tack welds are needed at the top and bottom of the rear seal where it meets the bedside, to keep the bedside from flexing.
5. Extend the cut. From the top of your cut line, cut 2.5″ deep and straight down.
6. Check clearance from below. Looking from the bottom/backside, there should be a large enough space for the whole kit (without the taillight) to install up from the bottom of the bedside into position, with enough room for the fuel hose. If it doesn’t fit, slight additional trimming may be needed.
7. Trim the corners. All four corners of the taillight pocket will need to be trimmed and dollied for clearance so the taillight can pivot open.
8. Set the depth. The kit should sit in 7/8″ deep, or the thickness of the taillight being used.
9. Tack and test. Mark its location and tack each corner to test fit once the kit and taillight have plenty of room to function.
10. Final weld. Once everything checks out, weld the entire perimeter.

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