GM Genuine Parts 84545446 DEF Pump Module – GM OE Quality

Overview

The GM Genuine Parts 84545446 Emission Reduction Fluid Supply Pump Module is a GM OE replacement designed for diesel exhaust fluid (DEF) systems. This pump is built to meet the same performance, durability, and service life you expect from General Motors, helping you maintain steady DEF flow and reliable operation between service intervals. Designed to replace the original factory component on GM vehicles, it integrates with ignition and engine fuel management to support smooth DEF delivery under everyday driving conditions. While results vary by vehicle and usage, installing this GM OE part preserves the engineering intent behind the DEF system and its delivery characteristics.

Key benefits (GM OE quality and fit)

• GM-recommended replacement part for your GM vehicle's original factory component
• Offering the quality, reliability, and durability of GM OE
• Manufactured to GM OE specification for fit, form, and function

Quality, durability, and real-world use

Engineered to endure typical driving conditions, this DEF pump module emphasizes long-term durability and dependable operation. Real-world use involves maintaining consistent DEF supply under varying engine loads, helping the system respond smoothly without unexpected flow changes. The emphasis on GM OE design and manufacturing aims to preserve the predictable behavior you expect from your diesel exhaust fluid system over time.

For many GM owners, a part that mirrors the original equipment supports a straightforward replacement experience, with components designed for proper connector alignment and seamless integration with existing DEF lines and fittings. This focus on fit and form helps installers achieve reliable seating and connector compatibility, reducing the chance of fit-related issues during service.

Fit, installation, and care

As a GM-recommended replacement part, this pump is designed for a straightforward fit into the vehicle’s original DEF hardware. Expect a direct replacement experience that minimizes guesswork and helps you maintain proper DEF pressure and delivery. Regular inspection of DEF lines and related connections can support consistent system performance over time.

Safety and compliance

Warning: CA Prop 65 - Cancer and Reproductive Harm. Follow all handling and disposal guidelines for DEF and related components.

What to expect after installation

• Direct replacement experience with preserved system compatibility
• Maintained DEF flow and delivery under varying operating conditions
• GM OE design ensures reliable fit and function
• Durability aligned with GM quality expectations for daily driving