2020 GMC Sierra 5'8" Short Bed Hard Folding Tonneau Cover

Premium Low Profile Aluminum Truck Bed Cover

The 2020 Sierra 1500 — A Proven Platform, Expanding Capability

The 2020 GMC Sierra 1500 built on the fifth-generation foundation with expanded powertrain options — including the 3.0L Duramax inline-six diesel — and updated technology packages that continued to position the Sierra as the premium-focused half-ton in the GM lineup. By 2020, the platform was proven and the bed architecture was consistent with the 2019 launch spec.

Thunder Armor is designed, engineered, sourced, and manufactured in the United States by Thunderstone Manufacturing. Premium-grade aluminum. Best-in-class low-profile design. Enhanced theft protection with a secure latch design. All-weather protection. No-drill installation. A 5-year limited warranty from an American manufacturer. Fitment confirmed for the 2020 GMC Sierra 1500 5'8" Short Bed. In stock and ready to ship today.

Thunder Armor Features & Benefits

• Made in America

  Proudly designed, engineered, sourced, and manufactured in the United States. True American craftsmanship in every detail.

• Heavy-Duty

  Made from premium-grade aluminum, built to last and provide years of reliable protection against the toughest conditions.

• Best-in-Class Low-Profile Design

  Engineered for a precision fit, Thunder Armor achieves a best-in-class low-profile design that sits virtually flush with your truck bed.

• Enhanced Theft Protection

  Durable aluminum construction and secure latch design provide reliable defense against theft and unauthorized access.

• Weather Resistance

  Keep your cargo dry and safe from rain, snow, and extreme temperatures with our robust all-weather design.

• Rear View Visibility

  A clean, flush look that maintains rear window visibility and maximizes your truck bed's usable space.

• Quick & Easy Installation

  Install your tonneau cover in just 30 minutes. Minimal tools required.

• Instant Availability

  In stock and ready to ship today.