Dorman Autograde Steel Cup Expansion Plug 2-7/31 In for Chevrolet GMC Workhorse 555-081

Steel cup expansion plug 2-7/31 inch for 2009-1965 Chevrolet and 2009-1968 GMC engines used to replace worn or leaking camshaft plugs.

Built to meet the manufacturer's design intent for reliable service, this engine camshaft plug is constructed from quality steel materials to ensure a secure fit and long-lasting durability in demanding automotive environments.

Key Features

• Constructed from durable steel for resistance against corrosion and wear
• Precisely sized at 2-7/31 inch diameter with 0.260 inch height
• Engineered to match original equipment form, fit, and function
• Validated through testing to ensure dependable performance
• Sold as a 10-piece pack for multiple replacements or inventory
• Direct replacement for General Motors part number 3999200

Benefits

• Restores engine integrity by sealing leaks in the camshaft area
• Reduces the risk of repeat repairs with robust material construction
• Ensures smoother installation with direct-fit design specifications
• Provides cost-effective solution compared to dealer-only parts
• Helps maintain proper engine oil pressure and prevents fluid loss
• Backed by over a century of automotive industry experience

Application

Ideal for mechanics and DIY enthusiasts repairing older Chevrolet, GMC, and Workhorse chassis vehicles requiring specific large-diameter expansion plugs for engine block or camshaft sealing applications.

Fitment Notes

• Compatible with select Chevrolet models from 1965 to 2009
• Compatible with select GMC models from 1968 to 2009
• Fits Workhorse and Workhorse Custom Chassis models from 1999 to 2011
• Verify vehicle fitment using part number 555-081 before purchase

Why Choose Dorman - Autograde?

• Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
• Built with quality materials and validated through testing to stand up to daily driving demands
• Supported by a team of product experts in the United States
• Offers a smart way to restore your vehicle with confidence and dependable performance

What's in the Box

• 10 PC Steel Cup Expansion Plugs

Item Dimensions

• 4.9in x 3.7in x 2.2in, 0.8lbs