LEER 100XL Topper is a premium cab-high fiberglass truck cap designed for the GMC Sierra 1500. Offering a sleek design, durable fiberglass construction, and secure cargo protection, the 100XL strikes a balance between everyday practicality and premium styling. Whether you’re using your Sierra for work, road trips, camping, or daily driving, this topper delivers dependable performance and a factory-inspired appearance.

Key Features

Cab-High Factory Fit

The LEER 100XL is engineered to match the roofline of the GMC Sierra 1500, providing a seamless look while maximizing enclosed cargo space.

Premium Fiberglass Construction

Manufactured from automotive-grade fiberglass, the topper offers:

• Lightweight yet durable construction
• Smooth, paint-ready finish
• Corrosion resistance
• Long-lasting performance

Flush-Style Side Windows

The 100XL features sleek side windows that provide:

• Modern, streamlined styling
• Improved aerodynamics
• Excellent visibility
• Easy maintenance

Locking Rear Glass Hatch

The rear hatch includes:

• Dark-tinted safety glass
• Gas-assisted lift supports
• Heavy-duty rotary latch locking system
• Wide-opening access for convenient loading and unloading

GMC Sierra 1500 Compatibility

The LEER 100XL is available for many GMC Sierra 1500 model years and bed configurations.

Fitment depends on:

• Model year
• Cab style (Regular Cab, Double Cab, or Crew Cab)
• Bed length
• Factory bed configuration, including select CarbonPro beds

Always verify compatibility before purchasing a topper.

Standard Features

Most LEER 100XL toppers include:

Popular Optional Upgrades

Many GMC Sierra owners choose to enhance the 100XL with:

• Sliding front window
• Interior LED lighting
• Roof rack tracks
• Remote keyless entry
• Side vent windows
• Pet screens
• Reinforced roof support for rooftop cargo or tents

These options improve convenience and expand the topper’s versatility.

Benefits of the LEER 100XL

Secure Cargo Storage

The locking rear hatch helps protect tools, luggage, camping gear, and other valuables from theft.

Reliable Weather Protection

The topper helps shield cargo from:

• Rain
• Snow
• Dust
• Road debris
• UV exposure

Factory-Inspired Appearance

Its flush-style side windows and paint-matched finish complement the bold styling of the GMC Sierra 1500.

Versatile Everyday Performance

The LEER 100XL is ideal for:

• Contractors
• Campers
• Overlanders
• Hunters
• Outdoor enthusiasts
• Everyday drivers

Advantages

Premium fiberglass construction
Sleek flush-style side windows
Factory paint-matched finish available
Secure locking rear hatch
Excellent weather resistance
Wide selection of available accessories