Four Seasons 39009 A/C Expansion Valve - Rear

Reliable A/C Expansion Valve for Select GM Vehicles

The Four Seasons Expansion Valve 39009 is engineered to regulate refrigerant flow in automotive air conditioning systems. Designed for compatibility with various Buick, Cadillac, Chevrolet, GMC, Pontiac, and Saturn models, this aluminum block-type valve ensures precise temperature control and system efficiency.

• Constructed from durable aluminum material
• Compatible with R134a refrigerant systems
• Block type design with two mounting holes for secure installation
• Female suction and liquid inlet/outlet fittings with sealing washer style
• Meets or exceeds OEM specifications for reliable performance

About the Four Seasons Expansion Valve Product Line

The Four Seasons Expansion Valve line focuses on delivering dependable A/C flow restrictors that maintain optimal refrigerant metering. This product line is designed to meet OEM standards, providing a direct replacement for factory-installed expansion valves. The 39009 model exemplifies this approach with its precise fitment and quality materials, ensuring consistent air conditioning performance across multiple GM vehicle platforms.

Detailed Product Description and Specifications

The Four Seasons 39009 expansion valve is crafted from aluminum, offering corrosion resistance and durability under typical automotive operating conditions. It is designed for use with R134a refrigerant, the standard for many modern vehicles. The block-type valve features two mounting holes for secure attachment and female fittings on both suction and liquid inlet/outlet ports. These fittings use a sealing washer style with specific thread diameters (No. 8, No. 10, and No. 12) to ensure leak-free connections. The valve includes two slimline washer O-rings ([24402] and [24403]) to maintain system integrity. This part is compatible with models such as the Buick LaCrosse, Cadillac Escalade ESV, Chevrolet Malibu, GMC Yukon XL 1500, Pontiac G6, and Saturn Aura.

Common Applications and Issues Addressed

• Regulates refrigerant flow to maintain proper A/C system pressure
• Prevents evaporator freezing and compressor damage
• Restores efficient cooling performance in Buick, Cadillac, Chevrolet, GMC, Pontiac, and Saturn vehicles
• Replaces faulty or leaking expansion valves causing inconsistent cabin temperatures
• Ensures proper refrigerant metering for R134a systems

Installation Notes and Tips

• Verify vehicle compatibility with the Four Seasons 39009 part number before installation
• Ensure all fittings and O-rings are properly seated to prevent refrigerant leaks
• Use appropriate tools to avoid damaging the aluminum valve body or fittings
• Follow manufacturer guidelines for refrigerant handling and system evacuation
• Inspect the A/C system for other potential issues during replacement

Quality Assurance and Warranty

The Four Seasons Expansion Valve 39009 meets or exceeds OEM standards, providing reliable performance and durability. Manufactured with precision and quality materials, this valve is backed by Four Seasons' commitment to automotive HVAC component quality. Warranty details should be confirmed with the product documentation or supplier.