GM 10.5" 14-Bolt Fiber Differential Cover Gasket

• Fiber gasket seals GM 10.5" 14-bolt full-floating differential covers

• Direct-fit replacement for worn, torn, or leaking factory gaskets

• Matches 14-bolt cover pattern and 10.5" ring gear housings

• Sold individually — pair with RTV or sealant per your service needs

A worn or torn differential cover gasket is a common source of gear-oil leaks, and this fiber gasket is a direct replacement sized for the GM 10.5" 14-bolt full-floating rear differential — identified by its 14 cover bolts and 10.5" ring gear diameter. It's built to match the cover bolt pattern and sealing rail of this specific housing for a proper seal.

This gasket does not fit the GM 9.5" 14-bolt or 11.5" 14-bolt differentials, since those use different cover bolt patterns and housing dimensions despite sharing the "14-bolt" name — verify your ring gear diameter and cover bolt count before ordering. It's sold individually as fiber construction, intended for use with your differential's existing hardware and, where preferred, an RTV sealant for added leak protection.

Commonly used on GM 3/4-ton and 1-ton trucks, vans, and SUVs running the 10.5" 14-bolt full-floating differential — service replacement for gasket wear, or as a companion part when installing a new cover.

Applications
Fits GM 10.5" 14-bolt full-floating rear differentials, commonly found on Chevrolet/GMC 3/4-ton and 1-ton trucks, vans, and SUVs, including Chevrolet C20/C2500, C30/C3500, K20/K2500, K30/K3500 (1973–1998), Silverado 2500/2500 HD (1999–2013), Silverado 3500 (1999–2015), Suburban 3/4-ton (1973–2000), Avalanche 2500 (2002–2006), Express 2500/3500 (1996–present), GMC equivalents, and Cadillac Escalade ESV 2500 (2002–2006).

Installation
Verify ring gear diameter (10.5") and cover bolt count (14) before ordering — this gasket will not fit the GM 9.5" 14-bolt or 11.5" 14-bolt differentials. Confirm gasket or RTV sealing requirements and fluid fill level before installation.

Does this gasket fit any 14-bolt differential?
No. This gasket is designed specifically for the GM 10.5-inch 14-bolt full-floating differential. It is not compatible with the GM 9.5-inch 14-bolt or 11.5-inch 14-bolt differentials, which use different bolt patterns and housing dimensions.

How do I know if my differential is the 10.5" 14-bolt version?
Verify that your differential has a 10.5-inch ring gear and a 14-bolt cover. Although several GM axles are referred to as "14-bolt," they use different ring gear sizes and gasket designs.

Do I need RTV sealant in addition to this gasket, or is the gasket enough on its own?
This is a fiber gasket designed for standard installation. While it can be installed on its own, many installers also apply a thin layer of RTV sealant for additional leak protection. Follow your vehicle or differential manufacturer's service recommendations.

How many gaskets come in this listing?
This listing includes one differential cover gasket.

What vehicles commonly use this differential?
The GM 10.5-inch 14-bolt full-floating rear differential is commonly found in Chevrolet and GMC 3/4-ton and 1-ton trucks, vans, and SUVs, including many C/K Series, Silverado, Sierra, Suburban, Express, and Savana models.

Is this the correct gasket for the GM 10.5" 14-bolt chrome differential cover kit?
Yes. This gasket matches the GM 10.5-inch 14-bolt full-floating differential bolt pattern and sealing surface. If purchasing separately from a differential cover kit, verify compatibility with your specific cover before installation.