Four Seasons 78376 A/C Compressor

Reliable A/C Compressor for GM Trucks and SUVs

The Four Seasons New Compressor 78376 is designed to restore efficient air conditioning performance in select Cadillac, Chevrolet, GMC, and Hummer vehicles. Engineered for compatibility with R134a refrigerant and equipped with essential features, this A/C compressor supports optimal climate control in heavy-duty trucks and SUVs.

• Compatible with R134a refrigerant and Pag 46 oil
• Includes oil pre-filled for immediate installation
• Features a 4-groove serpentine pulley for reliable belt engagement
• Equipped with a 12-volt coil and pin-type terminal
• Includes clutch assembly with a maximum diameter of 4.25 inches
• Tangent mount type with precise mounting distance of 16.51 mm
• Sealing washer type suction and discharge ports for leak prevention
• Designed as a Nippondenso 10s20f compressor type

About the Four Seasons New Compressor Line

The Four Seasons New Compressor product line offers brand-new, direct replacement compressors engineered to meet or exceed original equipment specifications. This line focuses on delivering reliable performance and durability for HVAC systems in a variety of vehicle applications. The New Compressor 78376 is part of this line, providing a fresh, oil-filled unit that includes the clutch assembly to simplify replacement in compatible GM trucks and SUVs.

Detailed Product Description

This Four Seasons A/C compressor (part number 78376) is designed specifically for use with R134a refrigerant and compatible with Pag 46 refrigerant oil, which is included pre-filled in the unit. The compressor features a 4-groove serpentine pulley with a diameter of approximately 4.25 inches, ensuring proper belt alignment and power transfer. The clutch assembly is included, with a maximum diameter of 4.25 inches and a coil voltage rating of 12 volts, utilizing a pin-type terminal and a single wire lead coil clock position for straightforward electrical connection. The compressor uses a tangent mount style with a mounting distance of 16.51 mm, suitable for direct replacement in select Cadillac Escalade, Chevrolet Silverado, GMC Sierra, Hummer H2, and other compatible models. Both suction and discharge ports use sealing washers to maintain system integrity and prevent refrigerant leaks.

Compatible Vehicles and Common Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Silverado 1500, 2500, 3500, Suburban 1500, 2500, Tahoe
• GMC Sierra 1500, 2500 HD, 3500 HD, Yukon, Yukon XL 1500, Yukon XL 2500
• Hummer H2
• Chevrolet Express 3500, Savana 2500

Common Issues Addressed by This Compressor

• Loss of A/C cooling performance due to compressor failure
• Clutch engagement problems causing intermittent A/C operation
• Refrigerant leaks from worn or damaged compressor seals
• Excessive noise or vibration from a failing compressor unit
• Incompatibility with R134a refrigerant systems requiring a direct replacement

Installation Notes and Tips

This compressor comes pre-filled with the correct amount of Pag 46 oil and includes the clutch assembly, simplifying the replacement process. Note that mounting hardware is not included and must be reused or sourced separately. It is recommended to use original equipment (OE) manifold fittings and consider using a deslugger tool (part number 36141) to clean the system before installation. Proper evacuation and recharge of the A/C system with R134a refrigerant are necessary to ensure optimal performance.

Quality Assurance and Warranty

The Four Seasons New Compressor 78376 is a brand-new unit manufactured to meet OEM specifications for durability and performance. It is designed to provide reliable operation in demanding automotive HVAC applications. Warranty coverage details should be confirmed with the distributor or manufacturer, as they may vary by region and application.