Motorad DEF105 Diesel Exhaust Fluid (DEF) Filler Cap

Diesel Exhaust Fluid Locking Cap Overview

The Motorad DEF105 Diesel Emissions Fluid Locking Cap helps seal the DEF filler neck to reduce leaks and spills during refueling and service. It is a direct replacement part for restoring proper operation of the diesel emissions fluid system on vehicles such as Chevrolet Silverado HD and GMC Sierra HD applications that use a DEF filler cap.

Key Features

• Replacement diesel exhaust fluid filler cap for DEF filler necks
• Helps prevent diesel exhaust fluid from leaking or spilling
• Supports cleaner handling of DEF during routine service
• Restores the diesel emissions fluid system to proper operation
• Motorad DEF105 replacement part number for catalog matching

Product Details

Motorad’s Diesel Emissions Fluid Locking Cap is built for diesel vehicles that use a DEF filler neck and need a service replacement cap. By sealing the opening properly, it helps keep fluid contained and helps reduce the chance of outside contaminants entering the system. This part is listed under Motorad DEF105 and cross-references Dorman - HD Solutions 904-5502 for the same application.

What It Helps Address

• DEF leaking from the filler neck
• Spilled diesel exhaust fluid during refueling
• Loss of proper sealing at the DEF fill point
• Contamination entering the diesel emissions fluid system
• Faulty or worn DEF filler cap replacement needs

Installation Notes

Install on the DEF filler neck after confirming the cap style and application match the vehicle. Verify the cap seats fully and locks as intended before returning the vehicle to service. Use the vehicle’s service information for any model-specific procedures related to the diesel emissions fluid system.

Quality Assurance

Motorad DEF105 is a replacement component intended to restore the DEF system to proper operation. Confirm fitment by part number and vehicle application before installation.