Standard Ignition BTL109 Center High Mount Stop Light

Center High Mount Stop Light Gasket Replacement

Standard Ignition BTL109 is a direct-fit center high mount stop light gasket replacement for select GM SUVs. It addresses dry-rotted third brake light seals and helps restore a tighter seal at the rear roof-mounted stop lamp area.

• Direct-fit replacement for easier installation
• Replaces deteriorated OE third brake light gasket material
• Helps reduce water intrusion at the center high mount stop light
• Built to meet or exceed OE performance expectations
• Fits 2003-2006 Chevrolet Suburban 1500, gasket
• Fits 2003-2006 Chevrolet Suburban 2500, gasket
• Fits 2003-2006 Chevrolet Tahoe, gasket
• Fits 2003-2006 GMC Yukon, gasket
• Fits 2003-2006 GMC Yukon XL 1500, gasket
• Fits 2003-2006 GMC Yukon XL 2500, gasket

Detailed Fitment and Function

This Standard Ignition BTL109 gasket is made for the center high mount stop light assembly on 2003-2006 Chevrolet Suburban 1500, Chevrolet Suburban 2500, Chevrolet Tahoe, GMC Yukon, GMC Yukon XL 1500, and GMC Yukon XL 2500. It is a practical replacement when the original third brake light seal has dried out, cracked, or no longer seals properly, which can allow moisture into the lamp area and contribute to brake light failure.

This part cross-references 49-1010 and TBL109 for the same application.

Common Issues This Part Can Address

• Water intrusion around the third brake light housing
• Dry-rotted or cracked OE gasket material
• Moisture-related brake light electrical problems
• Loose or degraded seal at the center high mount stop light
• Service replacement for worn rear roof lamp gasket on GM SUVs

Installation Notes and Tips

Verify the vehicle year, make, and model before installation. Inspect the mounting surface and lamp housing for debris, old seal material, or corrosion before fitting the new gasket. A clean, dry surface helps the gasket seat properly and supports a more reliable seal.

Quality Assurance

Standard Ignition states that this replacement is engineered to meet or exceed OE performance standards. The design focus is on proper fit and sealing performance for the center high mount stop light area.