DESCRIPTION

1973-1975 Chevy K5 Blazer & GMC Jimmy Cab Header Seal

Replace a hardened, cracked, damaged, or missing original with this 1973-1975 Chevy K5 Blazer and GMC Jimmy cab header seal from Precision Replacement Parts.

This header weatherstrip mounts along the rear of the cab and presses against the removable top/shell weatherstrip when the top is installed, helping seal the area between the cab and shell.

Manufactured from high-quality ozone-resistant EPDM rubber using original specifications, this replacement seal provides an OEM-style solution for restoring the weatherstrip on your classic Squarebody Blazer or Jimmy.

Manufacturer: Precision Replacement Parts
Product Type: Cab Header Seal / Weatherstrip
Application: 1973-1975 Chevy Blazer & GMC Jimmy
Material: Ozone-Resistant EPDM Rubber
Location: Rear of Cab / Removable Top
Quantity: 1 Header Seal
Warranty: Manufacturer Lifetime Warranty

Features

• Fits select 1973-1975 Chevrolet K5 Blazer and GMC Jimmy

• Manufactured by Precision Replacement Parts

• OEM-style design

• Made from high-quality ozone-resistant EPDM rubber

• Manufactured from original specifications

• Mounts along the rear of the cab

• Presses against the removable shell/top weatherstrip

• Replaces a cracked, hardened, deteriorated, or missing original seal

• Designed for straightforward installation

• Manufacturer lifetime warranty

• Sold individually – one header seal per package

What Is the Blazer Cab Header Seal?

On these early Squarebody Blazer and Jimmy models, the removable top meets the cab behind the driver and passenger seating area.

This cab header seal mounts along the rear edge of the cab and presses against the weatherstrip on the removable shell when the top is installed.

You may also see this part referred to as a Blazer header seal, cab-to-top seal, cab-to-shell weatherstrip, removable top seal, or rear cab header weatherstrip.

After decades of exposure to heat, weather, and repeated removal of the top, the original rubber can become compressed, brittle, cracked, torn, or completely missing.

Replacing the header seal helps restore this important portion of the weather sealing system between the cab and removable top.

Ozone-Resistant EPDM Rubber

This replacement header seal is made from high-quality EPDM rubber, a material commonly used for automotive weatherstripping because of its resistance to weathering and ozone exposure.

Precision Replacement Parts manufactures this seal using original specifications for an OEM-style design and fit.

It's an excellent item to replace when restoring the removable top weatherstrip, repainting the cab or shell, or replacing old and deteriorated original rubber.

Installation

This header seal mounts to the rear of the cab and presses against the shell weatherstrip when the removable top is installed.

Weatherstrip adhesive is required for installation and is not included.

Before installation, remove the old weatherstrip and adhesive and properly prepare the mounting surface according to the adhesive manufacturer's instructions.

Final alignment should be checked with the removable top installed to ensure the weatherstrip properly meets the corresponding shell seal.

Vehicle Fitment

Chevrolet

• 1973 Chevrolet Blazer

• 1974 Chevrolet Blazer

• 1975 Chevrolet K5 Blazer

GMC

• 1973 GMC Jimmy

• 1974 GMC Jimmy

• 1975 GMC Jimmy

Important Fitment Information

This seal is designed for the rear cab header where the removable top/shell meets the cab.

It is not the complete removable top weatherstrip kit and should not be confused with the corresponding weatherstrip located on the shell.

Weatherstrip adhesive is required and is sold separately.

Please verify your vehicle's year, model, and removable top configuration before ordering.

Frequently Asked Questions

Does this header seal fit a 1973-1975 Chevy K5 Blazer?
It fits applicable 1973, 1974, and 1975 Chevrolet Blazer/K5 Blazer applications listed above.

Does this fit a GMC Jimmy?
Yes. This header seal is designed for compatible 1973-1975 GMC Jimmy applications.

Where does this seal install?
It mounts along the rear of the cab, where it presses against the weatherstrip on the removable top/shell.

Is this the seal that goes on the removable top?
This particular seal mounts to the cab and presses against the corresponding shell weatherstrip. It is not the complete shell weatherstrip.

Is weatherstrip adhesive included?
No. Weatherstrip adhesive is required for installation but is not included.

What is the seal made from?
It is manufactured from high-quality ozone-resistant EPDM rubber using original specifications.

Who manufactures this header seal?
This weatherstrip is manufactured by Precision Replacement Parts.

Is this seal sold as a pair?
No. This listing includes one complete cab header seal.

Does it have a warranty?
Yes. This Precision Replacement Parts weatherstrip is backed by a manufacturer lifetime warranty.

Restore the Weather Sealing on Your K5 Blazer or Jimmy

The removable top is one of the features that makes an early Squarebody Blazer or Jimmy unique, but decades-old weatherstrip can make sealing that top a challenge.

Whether you're restoring a 1973 Chevy Blazer, replacing old rubber on a 1975 K5, or putting the removable top back on a classic GMC Jimmy, this Precision cab header seal provides an OEM-style replacement for the deteriorated original.