GMC Sierra Camper Shell by LEER
Our LEER 100XQ GMC Sierra camper shell transforms your pickup bed into fully enclosed, weathertight cargo space that protects tools, gear, and equipment from the elements. We engineered this model to match your Sierra’s cab contours with precision-molded fiberglass construction that delivers legendary LEER durability.
Every 100XQ shell features tinted automotive glass, a multi-position tailgate lock that works with your factory tailgate handle, and foam-sealed mounting clamps that eliminate water intrusion. We offer custom paint matching to factory GMC colors so your shell looks factory-installed from day one.
What makes this GMC Sierra cap stand out
Construction & Weatherproofing
We build every LEER gmc sierra camper shell from a single fiberglass mold specific to your Sierra’s bed length and cab style. This one-piece construction eliminates seams where water can seep through, and our high-pressure molding process creates consistent wall thickness that won’t crack under torque flex when you’re hauling heavy loads off-road.
The mounting system uses compression foam weatherstripping that conforms to your bed rail profile. We install stainless steel clamps every twelve inches along the perimeter to maintain constant pressure and prevent the shell from shifting during highway driving or rough terrain. Tinted glass panels are bonded with automotive-grade urethane sealant and backed by aluminum frames that won’t corrode in salt or moisture.
Tailgate Access & Security
Locking Tailgate Integration
Our multi-position lock replaces your factory tailgate handle and works with your existing Sierra key. You can lock the shell’s rear window independently while leaving the tailgate unlocked for loading long items like lumber or ladders. The three-position handle lets you open the window only, drop the tailgate with the window closed, or open both simultaneously.
Side Window Options
We offer flush-mount sliding side windows on both passenger and driver sides. Each window features a locking latch and screen insert to keep bugs out when you’re camping or need ventilation while parked. The screens remove completely when you need maximum airflow for drying wet gear after a fishing trip or trail ride.
Interior Configuration & Accessories
The carpeted headliner comes standard with provisions for an LED dome light wired to your Sierra’s cargo lamp circuit. We route the wiring harness through the same grommet as your third brake light so installation is clean and factory-integrated. The headliner also dampens road noise and reduces interior temperature swings when you’re parked in direct sun.
Our optional roof rack system bolts directly to reinforced mounting points molded into the shell’s roof. The crossbars support up to 150 pounds of evenly distributed weight for kayaks, paddleboards, or rooftop cargo boxes. We also offer a carpeted bed rug that fits your Sierra’s bed dimensions and protects the shell’s interior floor from scratches when you’re loading tools or climbing gear. For readers comparing enclosed storage versus open hauling, the same fiberglass durability that defines our truck caps across all models ensures your investment holds up through years of hard use.
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Common Questions About the LEER GMC Sierra Camper Shell
Yes, we manufacture the LEER 100XQ specifically for Sierra 1500, 2500HD, and 3500HD models. You’ll need to specify your exact bed length when ordering since the shell is molded to fit either the 5’8″, 6’6″, or 8′ bed perfectly.
Our dealers use digital templates to verify your truck’s wheelbase, cab configuration, and bed rail height before placing the order. HD models with spray-in bedliners may require slightly longer mounting clamps to achieve proper compression on the foam weatherseal.
Wash your shell with the same car wash soap you use on your Sierra’s painted panels. The gel-coat finish is durable, but avoid abrasive compounds or automatic brushes that can scratch the clear coat.
We recommend waxing the shell twice a year with automotive paste wax to protect the UV clear coat. If you notice minor scratches, most can be buffed out with rubbing compound. The fiberglass won’t rust or corrode, so you don’t need to worry about chips exposing bare metal like you would with aluminum caps.
Yes, we offer a crossbar roof rack system designed specifically for the 100XQ. The rack bolts into reinforced mounting points molded into the shell’s roof during manufacturing, so you’re not drilling through the fiberglass or compromising the structure.
The system supports up to 150 pounds evenly distributed and includes adjustable crossbars that slide forward or back to accommodate different cargo lengths. You can also add our kayak cradles, bike mounts, or cargo basket accessories that attach to the crossbars.
The LEER 100XQ is designed with aerodynamic contours that follow your Sierra’s cab profile, which minimizes drag compared to an open bed. Most customers report no noticeable change in highway fuel economy, and some see a slight improvement because the shell reduces turbulence in the bed.
The shell weighs approximately 180-220 pounds depending on bed length and window configuration, which is minimal compared to your Sierra’s payload capacity. Any mileage impact from the added weight is offset by the improved aerodynamics at highway speeds.
Every LEER 100XQ comes with a 3-year structural warranty covering the fiberglass body, frame, and mounting system against defects in materials and workmanship. Glass panels, locks, and weatherstripping carry a 1-year warranty.
The warranty is transferable if you sell your Sierra, which helps maintain resale value. We also offer an optional extended warranty that covers paint finish and hardware for up to 5 years. Your installing dealer handles all warranty claims and can order replacement parts directly from LEER.
Yes, the LEER 100XQ mounts to your bed rails without blocking access to the factory tie-down hooks in the bed corners. You can still use cargo straps, ratchet ties, or bungee cords to secure loads inside the shell.
We also offer an optional bed rug that includes built-in D-ring tie-downs along the sides for additional anchor points. If you’re hauling particularly heavy equipment, our dealers can install aftermarket tie-down tracks that run the length of the bed rail under the shell’s mounting clamps.
We maintain paint codes for GMC special editions including Denali, AT4, and limited-run colors. When you order through an authorized LEER dealer, they’ll provide your truck’s paint code from the door jamb sticker, and our paint team will match it exactly.
For tri-coat metallics or custom colors, we send a painted sample panel for you to approve before finishing your shell. The color match process adds approximately one week to the standard production time, but ensures your shell blends seamlessly with your Sierra’s factory finish.