Buick GS 400 Weatherstrip & Seals - OEM-Fit Door, Trunk & Window Seals

Stop leaks, drafts, and road noise in your Buick GS 400 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 Buick GS 400—restoring a tight, quiet seal around your doors, trunk, hatch, and windows.

Our Buick GS 400 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 Buick GS 400, 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 Buick GS 400.

1968-1969 Buick GS 400 Sold By The Foot - Convertible Top Windshield Header Weatherstrip Seal.

This item is sold by the foot. This convertible top windshield header seal, designed for classic cars, measures with clips installed every 3-5/8" for a secure fit. Crafted from soft, black, skin-covered sponge, it ensures a snug seal to keep out wind and water, enhancing the comfort and protection of your vehicle's interior. Made with high-quality EPDM extrusion, this seal offers excellent rebound memory, maintaining its shape and effectiveness over time. This part fits a wide range of 1964-1970 models, including Buick Electra, Chevrolet Impala, Oldsmobile Cutlass, and more, making it a versatile choice for restoring your classic car. Backed by Metro's 30-year warranty, you can trust in its durability and performance for years to come.

Features and Benefits
  • Provides a tight seal to block wind and water.
  • Made from durable, high-quality EPDM material.
  • Customizable length for a perfect fit.

$13.99
• SALE $11.95
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1968-1969 Buick GS 400 Sold By The Foot - Convertible Top Windshield Header Weatherstrip Seal.
1968 Buick GS 400 Trip Meter Reset Knob. Made of Black Rubber.

This trip meter reset knob is designed for classic cars, including the 1949-1967 Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. Measuring 1/8" I.D., 7/16" O.D., and 1/2" tall, it is crafted from durable black rubber for a precise fit and long-lasting performance. The knob features a ribbed texture for easy grip and a clean, classic look that complements your vehicle's interior. Precision-molded using high-pressure techniques, it ensures a snug and secure installation, making it simple to replace your old or worn-out reset knob. Backed by Metro's 30-year warranty, this part offers peace of mind and reliability for years to come.

Features and Benefits
  • Easy-to-install design saves time and effort.
  • Ribbed texture provides a secure grip for smooth operation.
  • High-pressure molding ensures a precise fit and durability.

$16.99
• SALE $13.95
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1968 Buick GS 400 Trip Meter Reset Knob. Made of Black Rubber.
1968-1969 Buick GS 400 Park Brake Pedal Pad. 2-3/8" Wide. Each.

This park brake pedal pad, measuring 2-3/8" wide, is designed for cars and trucks, including the 1964-1972 Buick Skylark, Chevrolet Chevelle, Pontiac GTO, and more, as well as the Chevrolet El Camino truck. Crafted by Metro Moulded Parts, it features precise curves and details to ensure a snug fit and an authentic look that matches the original design. The textured surface with "PARK" embossed provides a secure grip and enhances the classic appearance of your vehicle's interior. Installation is straightforward, as the pad easily slips onto the brake pedal, making it a quick and effective upgrade. Backed by a 90-day warranty, this part ensures peace of mind with its quality and durability.

Features and Benefits
  • Designed to fit snugly for easy installation.
  • Matches the original look for a classic finish.
  • Textured surface enhances grip and safety.
  • Durable construction ensures long-lasting use.

$31.49
• SALE $25.95
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1968-1969 Buick GS 400 Park Brake Pedal Pad. 2-3/8" Wide. Each.
1968-1969 Buick GS 400 Rear Roll-Up Quarter Window Weatherstrip Seals.

For 2-door hardtops and convertibles, these rear roll-up quarter window seals measure 16-1/2" long and are sold as a pair. Designed specifically for 1968-1972 Buick, Chevrolet, Oldsmobile, and Pontiac models, as well as select 1969-1970 Cadillac and 1971-1972 Chevrolet Monte Carlo cars, these seals ensure a snug fit and reliable performance. Crafted by Metro Moulded Parts, they are made from advanced rubber compounds that resist sunlight, ozone, and chemicals, ensuring long-lasting durability. Unlike cheaper alternatives, these seals are free from accelerants and fillers that can lead to premature wear. Their sleek black finish complements the vehicle's design while providing a tight seal to keep out water, dust, and wind noise. Backed by Metro's 30-year Platinum Warranty, you can trust these seals to maintain their integrity for decades.

Features and Benefits
  • Protects against water, dust, and wind noise.
  • Made from durable, chemical-resistant rubber.
  • Designed for a precise fit on classic 2-door models.

$33.99
• SALE $27.95
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1968-1969 Buick GS 400 Rear Roll-Up Quarter Window Weatherstrip Seals.
1968-1969 Buick GS 400 Rear Side Roll-Up Window Weatherstrip Seal, for Hardtops and Convertibles.

For hardtops and convertibles, this rear side roll-up window seal comes in two 20-inch sections designed to slide seamlessly into the metal track, ensuring a snug and secure fit. Crafted by Metro Moulded Parts, these seals are made from advanced rubber compounds that resist sunlight, ozone, and chemicals, offering long-lasting durability. Unlike cheaper alternatives, these seals are free from accelerants and fillers, preventing premature aging or failure. Designed for a wide range of classic cars, including 1964-1969 Buick, Cadillac, Chevrolet, Ford, Oldsmobile, and Pontiac models, this pair of seals is an essential upgrade for restoring your vehicle's weatherproofing and maintaining its classic appeal. With no steel insert, installation is straightforward, and the seals provide a clean, polished look while keeping out wind and moisture. Backed by Metro's reputation for quality, these seals are a reliable choice for your restoration project.

Features and Benefits
  • Protects against wind and moisture for a quieter ride.
  • Made from durable, chemical-resistant rubber for longevity.
  • Easy installation with a precise fit into the metal track.
  • Enhances the weatherproofing and appearance of your classic car.

$34.49
• SALE $27.95
Select Color/Material Options  
1968-1969 Buick GS 400 Rear Side Roll-Up Window Weatherstrip Seal, for Hardtops and Convertibles.

(45 Total Products)