Four Seasons 77377 A/C Compressor

Overview of Four Seasons Reman Compressor 77377

The Four Seasons Reman Compressor 77377 is a remanufactured A/C compressor designed for select GM vehicles including Cadillac, Chevrolet, GMC, and Hummer models. Engineered to work with R134a refrigerant and compatible with Pag 46 refrigerant oil, this compressor ensures reliable air conditioning performance for trucks and SUVs such as the Chevrolet Silverado and GMC Sierra.

• Compatible refrigerant type: R134a
• Includes oil filled with Pag 46 refrigerant oil
• Compressor type: 10s17f with 12V coil voltage
• Includes clutch assembly with 4-groove serpentine pulley
• Pin terminal type and tangent mount installation
• Designed for use with sealing washer discharge and suction ports
• Includes slimline washer O-rings for proper sealing

Four Seasons Reman Compressor Product Line Details

The Reman Compressor line by Four Seasons offers remanufactured A/C compressors that meet strict quality standards to restore factory-level performance. This product line focuses on providing reliable, cost-effective replacements with included oil and clutch assemblies, designed to fit specific vehicle applications. The 77377 model is part of this line, ensuring compatibility and durability for GM trucks and SUVs requiring a Nippondenso 10s17f compressor type.

Technical Description and Features

The Four Seasons 77377 compressor is a remanufactured unit filled with the recommended Pag 46 oil and designed for R134a refrigerant systems. It features a 4-groove serpentine pulley with a 4.25-inch diameter clutch included, ensuring proper engagement and drive. The compressor uses a pin-type terminal and a single wire lead coil clock position for electrical connection. Mounting is tangent style with a 0.65625-inch distance from clutch to mounting flange, suitable for direct replacement in compatible vehicles. Both suction and discharge ports utilize sealing washers for leak prevention, and the package includes slimline washer O-rings for installation.

Compatible Vehicles and Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500/2500, Silverado 1500/2500/3500 (including Classic and HD variants)
• GMC Sierra 1500/2500/3500 (including Classic and HD variants)
• Hummer H2, H3, H3T
• Chevrolet Express 2500/3500 and GMC Savana 2500/3500
• Suburban 1500/2500, Tahoe, Yukon, Yukon XL 1500/2500

Common Issues Addressed by This Compressor

• Loss of A/C cooling due to compressor failure
• Clutch engagement problems causing intermittent A/C operation
• Refrigerant leaks from worn seals or ports
• Noise or vibration from worn compressor components
• Incompatibility with R134a refrigerant systems requiring proper oil and seals

Installation Notes and Tips

Installation of the Four Seasons Reman Compressor 77377 requires attention to proper mounting and sealing. Use the included slimline washer O-rings ([24404] and [24402]) to ensure leak-free connections at suction and discharge ports. The clutch and oil are included, eliminating the need for separate purchases. Note that mounting hardware is not included and may need to be reused or sourced separately. It is recommended to use the OE manifold and consider a deslugger tool (part number 36141) to clean the system before installation to prevent contamination.

Quality Assurance and Warranty

This remanufactured compressor undergoes rigorous testing to meet Four Seasons quality standards. It is designed to restore proper A/C function in compatible GM vehicles. Warranty coverage details should be confirmed at the point of purchase, but Four Seasons typically offers limited warranties on remanufactured parts to ensure customer confidence in product reliability.