LEER GMC Sierra Camper Shell | Premium Truck Cap for Sierra 1500, 2500HD & 3500HD
Our LEER 100XQ transforms your GMC Sierra into a secure, weatherproof hauler. This fiberglass camper shell fits Sierra 1500, 2500HD, and 3500HD models with precision-cut mounting rails that match factory bed contours.
The 100XQ features a one-piece fiberglass construction with reinforced corners and a high-mounted third brake light. We paint every shell to match your Sierra's factory color using OEM-grade automotive paint and clear coat, so the cap becomes a seamless extension of your truck's roofline. Heavy-duty rubber seals run the entire perimeter to keep rain, snow, and road dust out of your bed.
- Fits GMC Sierra 1500, 2500HD, 3500HD (2007-current, short and standard beds)
- One-piece fiberglass construction with reinforced aluminum frame
- Factory paint match using OEM Sierra color codes
- Dual-action rear door with rotary latch and slam lock
- Integrated third brake light (LED) with plug-and-play harness
Fiberglass Construction & Paint Match Process
Every LEER gmc sierra camper shell starts with a one-piece fiberglass molding process that eliminates seams and weak points. We hand-lay fiberglass resin over precision molds designed specifically for Sierra bed dimensions, then reinforce the inner frame with welded aluminum tubes at stress points—the same construction method we use across our camper shell lineup for all major truck brands.
Our paint shop uses GMC’s official WA and GBA color codes to mix automotive-grade basecoat and clearcoat. We apply four coats (primer, two base, one clear) in a climate-controlled booth, then cure the shell at 140°F for six hours. The finish matches your Sierra’s factory panels so precisely that most owners can’t see the transition line between cab and cap.
Weatherproof Seals & Sierra Bed Integration
We install a continuous EPDM rubber seal around the base flange of your gmc sierra camper shell. This seal compresses against your Sierra’s bed rails when you tighten the mounting clamps, creating a waterproof barrier that withstands highway speeds and pressure washers.
The rear door uses dual seals—one on the door edge and one on the shell frame—to prevent water intrusion during heavy rain. The door’s rotary latch engages four locking points simultaneously, so there’s no rattle or flex when you’re driving on rough terrain. A keyed slam lock lets you secure tools and cargo without carrying an extra key; it uses your Sierra’s ignition key pattern.
Sierra Model Compatibility & Bed Sizing
The LEER 100XQ fits GMC Sierra 1500, 2500HD, and 3500HD trucks from 2007 to current model years. We manufacture separate molds for each bed length—5’8″ short bed, 6’6″ standard bed, and 8′ long bed—so the shell sits flush with your Sierra’s cab and tailgate.
For 2019-newer Sierra models with the MultiPro tailgate, we include a recessed door panel that provides clearance when you fold the inner gate down. The shell’s side windows are cut 2 inches lower on Denali and AT4 trim levels to match those models’ sportier rooflines.
More LEER Camper Shells for Full-Size Trucks
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GMC Sierra Camper Shell Buyer Questions
Yes, we manufacture the 100XQ in three bed sizes: 5'8" short bed, 6'6" standard bed, and 8' long bed. Each shell is molded specifically for that bed length to ensure a flush fit with your Sierra's cab and tailgate.
When you order, specify your Sierra's year, model (1500/2500HD/3500HD), and bed length. We'll ship the correct shell with mounting hardware sized for your truck's bed rails.
Yes, we paint every LEER shell using GMC's official color codes from your truck's VIN plate. Our paint shop stocks over 200 Sierra colors, including special edition shades like Carbonized Grey Metallic and Dark Sky Metallic.
The paint process uses OEM-grade automotive basecoat and clearcoat with UV inhibitors, so the finish matches your Sierra's gloss level and resists fading for 10+ years. Most dealers photograph the installed shell next to the cab to show the seamless color match.
We recommend professional installation at a LEER-authorized dealer to ensure proper alignment and seal compression. The shell weighs 180-220 pounds depending on bed size, so you'll need two people minimum to lift it onto the truck.
Installation involves positioning the shell, adjusting four mounting clamps, drilling holes in pre-2014 Sierra bed rails (or using factory inserts on newer models), and connecting the third brake light wiring. A professional installer completes the job in 90 minutes with proper torque specs and weatherproofing.
Yes, the LEER 100XQ is fully compatible with the MultiPro tailgate on 2019-newer Sierra models. We design the rear door panel with a recessed area that provides clearance when you fold down the inner gate section.
You can operate all six MultiPro configurations—primary gate, inner gate, load stop, step, and work surface—without removing or adjusting the camper shell. The door's dual seals maintain weatherproofing in all tailgate positions.
The LEER 100XQ has 18-20 inches of interior height at the front (near the cab) and 16-18 inches at the rear door, depending on your Sierra's bed length. This low-profile design maintains your truck's aerodynamics while providing enough space for toolboxes, coolers, and camping gear.
For taller cargo or standing room, consider our LEER 180 raised-roof cap with 36 inches of interior height and a walk-in rear door.
Clean the EPDM rubber seals every three months with mild soap and water to remove dirt and road salt. Dry the seals completely, then apply a silicone-based rubber conditioner to keep them pliable.
Inspect the seals twice a year for cracks or compression damage. If you notice water intrusion, check that the mounting clamps are torqued to 15 ft-lbs and the seal surfaces on your bed rails are clean. LEER seals typically last 5-7 years in normal conditions before needing replacement.
No, installing a LEER camper shell does not void your Sierra's factory warranty. The Magnuson-Moss Warranty Act prevents manufacturers from voiding warranties due to aftermarket accessories unless the accessory directly causes a covered failure.
We design the 100XQ to mount using non-invasive clamps on your bed rails. The only modification on 2007-2013 models is drilling four small holes through the bed rails, which doesn't affect GMC's powertrain, body, or corrosion warranties.