Motorad DEF102 Diesel Exhaust Fluid (DEF) Filler Cap

Diesel Emissions Fluid Cap for GM Diesel Applications

The Motorad DEF102 Diesel Emissions Fluid Cap is a specific-fit replacement for select GM diesel vehicles. It helps seal the DEF filler neck to reduce leaks and spills while supporting a cleaner emissions system.

Built with a blue plastic and rubber construction, this cam-on DEF filler cap is made for direct replacement use on compatible Chevrolet Express, Silverado HD, GMC Savana, and Sierra HD models.

Key Features

• Motorad Diesel Emissions Fluid Cap, part number DEF102
• Cam-on attachment type with male thread design
• Blue plastic and rubber construction
• Inside diameter: 1.09 in; thread diameter: 1.30 in
• Shell diameter: 1.56 in
• Specific fit for select GM diesel emissions fluid systems
• Replacement cap for DEF filler neck sealing

Product Details

The Motorad DEF102 is a diesel exhaust fluid filler cap engineered for vehicles that use a cam-on DEF cap design. It restores proper closure at the filler neck, helping keep DEF contained and limiting outside contamination from entering the system. This part is a direct replacement for applications including Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD. The Motorad DEF102 is also referenced by cross numbers such as Dorman - HD Solutions 904-5601.

What It Helps Address

• DEF leaking from the filler neck
• Spilled diesel exhaust fluid during refueling
• Loss of a secure seal at the DEF tank opening
• Contamination entering the diesel emissions fluid system
• Damaged or missing DEF filler cap on compatible GM diesel trucks and vans

Installation Notes and Tips

Verify cam-on style, thread dimensions, and specific fit before installation. This cap is intended for compatible Chevrolet Express and Silverado HD, as well as GMC Savana and Sierra HD diesel applications from the listed model years. Inspect the filler neck for damage or debris before installing the replacement cap, and confirm the cap seats fully and locks in place.

Quality Assurance

Motorad supplies this DEF filler cap as a replacement part for restoring diesel emissions fluid system operation on the listed applications. Its specific-fit design and material selection support proper sealing at the filler neck.