GMC Weatherstrip & Seals - OEM-Fit Door, Trunk & Window Seals

Stop leaks, drafts, and road noise in your GMC with precision-fit replacement weatherstrip and seals designed specifically for your vehicle. Each seal is engineered to match the original profile and mounting groove of your GMC —restoring a tight, quiet seal around your doors, trunk, hatch, and windows.

Our GMC weatherstrip is manufactured from durable, weather-resistant rubber compounds such as EPDM, engineered for an exact OEM-quality fit and finish. These materials resist sunlight, ozone, and chemical exposure while maintaining flexibility across temperature extremes, so your new seals stay soft and pliable instead of cracking or hardening the way factory-original rubber does over time.

Use the Vehicle Selector above to find the correct weatherstrip for your GMC , or browse below to explore available options. Whether you’re chasing down a stubborn water leak or completing a full restoration, Factory Interiors makes it easy to achieve a tight, factory-quality seal with precision-fit weatherstrip for your GMC .

1966 GMC 1000 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

This rear window seal is designed for 1955-1966 GM full-size trucks, second series, with a large window. It includes a lockstrip and comes as a set of two, ensuring a snug and secure fit for your truck's rear window. Crafted by Metro Moulded Parts, this seal is built to provide a tight, weatherproof barrier, keeping out water, dust, and wind while maintaining the classic look of your truck. The durable material ensures long-lasting performance, making it a reliable choice for restoration or repair projects. This part fits a wide range of models, including 1955-1966 Chevrolet and GMC trucks, such as the C10, C20, K10, and various GMC series trucks. Installation is straightforward, as the seal is designed to fit precisely into the rear window frame, providing a clean and professional finish. Backed by a 90-day warranty, this seal offers peace of mind and quality assurance.

Features and Benefits
  • Provides a tight seal to protect against water and dust.
  • Includes a lockstrip for added security and ease of installation.
  • Designed for a precise fit on 1955-1966 GM full-size trucks.
  • Durable material ensures long-lasting performance.

$100.99
• SALE $80.95
Select Color/Material Options  
1966 GMC 1000 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.
1960-1965 GMC 1000 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

This rear window seal is designed for 1955-1966 GM full-size trucks, second series, with a large window. It includes a lockstrip and comes as a set of two, ensuring a snug and secure fit for your truck's rear window. Crafted by Metro Moulded Parts, this seal is built to provide a tight, weatherproof barrier, keeping out water, dust, and wind while maintaining the classic look of your truck. The durable material ensures long-lasting performance, making it a reliable choice for restoration or repair projects. This part fits a wide range of models, including 1955-1966 Chevrolet and GMC trucks, such as the C10, C20, K10, and various GMC series trucks. Installation is straightforward, as the seal is designed to fit precisely into the rear window frame, providing a clean and professional finish. Backed by a 90-day warranty, this seal offers peace of mind and quality assurance.

Features and Benefits
  • Provides a tight seal to protect against water and dust.
  • Includes a lockstrip for added security and ease of installation.
  • Designed for a precise fit on 1955-1966 GM full-size trucks.
  • Durable material ensures long-lasting performance.

$100.99
• SALE $80.95
Select Color/Material Options  
1960-1965 GMC 1000 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.
1966 GMC 1500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

This rear window seal is designed for 1955-1966 GM full-size trucks, second series, with a large window. It includes a lockstrip and comes as a set of two, ensuring a snug and secure fit for your truck's rear window. Crafted by Metro Moulded Parts, this seal is built to provide a tight, weatherproof barrier, keeping out water, dust, and wind while maintaining the classic look of your truck. The durable material ensures long-lasting performance, making it a reliable choice for restoration or repair projects. This part fits a wide range of models, including 1955-1966 Chevrolet and GMC trucks, such as the C10, C20, K10, and various GMC series trucks. Installation is straightforward, as the seal is designed to fit precisely into the rear window frame, providing a clean and professional finish. Backed by a 90-day warranty, this seal offers peace of mind and quality assurance.

Features and Benefits
  • Provides a tight seal to protect against water and dust.
  • Includes a lockstrip for added security and ease of installation.
  • Designed for a precise fit on 1955-1966 GM full-size trucks.
  • Durable material ensures long-lasting performance.

$100.99
• SALE $80.95
Select Color/Material Options  
1966 GMC 1500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.
1960-1965 GMC 1500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

This rear window seal is designed for 1955-1966 GM full-size trucks, second series, with a large window. It includes a lockstrip and comes as a set of two, ensuring a snug and secure fit for your truck's rear window. Crafted by Metro Moulded Parts, this seal is built to provide a tight, weatherproof barrier, keeping out water, dust, and wind while maintaining the classic look of your truck. The durable material ensures long-lasting performance, making it a reliable choice for restoration or repair projects. This part fits a wide range of models, including 1955-1966 Chevrolet and GMC trucks, such as the C10, C20, K10, and various GMC series trucks. Installation is straightforward, as the seal is designed to fit precisely into the rear window frame, providing a clean and professional finish. Backed by a 90-day warranty, this seal offers peace of mind and quality assurance.

Features and Benefits
  • Provides a tight seal to protect against water and dust.
  • Includes a lockstrip for added security and ease of installation.
  • Designed for a precise fit on 1955-1966 GM full-size trucks.
  • Durable material ensures long-lasting performance.

$100.99
• SALE $80.95
Select Color/Material Options  
1960-1965 GMC 1500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.
1966 GMC 2500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

This rear window seal is designed for 1955-1966 GM full-size trucks, second series, with a large window. It includes a lockstrip and comes as a set of two, ensuring a snug and secure fit for your truck's rear window. Crafted by Metro Moulded Parts, this seal is built to provide a tight, weatherproof barrier, keeping out water, dust, and wind while maintaining the classic look of your truck. The durable material ensures long-lasting performance, making it a reliable choice for restoration or repair projects. This part fits a wide range of models, including 1955-1966 Chevrolet and GMC trucks, such as the C10, C20, K10, and various GMC series trucks. Installation is straightforward, as the seal is designed to fit precisely into the rear window frame, providing a clean and professional finish. Backed by a 90-day warranty, this seal offers peace of mind and quality assurance.

Features and Benefits
  • Provides a tight seal to protect against water and dust.
  • Includes a lockstrip for added security and ease of installation.
  • Designed for a precise fit on 1955-1966 GM full-size trucks.
  • Durable material ensures long-lasting performance.

$100.99
• SALE $80.95
Select Color/Material Options  
1966 GMC 2500 Rear Window Weatherstrip Seal '55-'66 GM Full Size Truck W/ Black Lockstrip.

(1091 Total Products)