Four Seasons 77548 A/C Compressor

Overview of Four Seasons Reman Compressor 77548

The Four Seasons Reman Compressor 77548 is a remanufactured A/C compressor designed for select Buick, Chevrolet, GMC, Isuzu, and Saab models. Engineered to work with R134a refrigerant and compatible with Pag 46 refrigerant oil, this compressor ensures reliable air conditioning performance for vehicles like the Chevrolet Trailblazer and GMC Envoy.

• Compatible Refrigerant: R134a
• Refrigerant Oil Type: Pag 46
• Compressor Type: TRSA12B
• Coil Voltage: 12V with 1 wire lead
• Pulley Groove Quantity: 4, Serpentine belt type
• Mounting Type: Tangent mount with 40.64 mm mount distance
• Includes clutch and heat sensor switch
• Oil filled and includes sealing washers and O-rings
• Terminal Type: Pin

Four Seasons Reman Compressor Product Line

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 components such as clutches and heat switches, reducing the need for additional parts. The 77548 model exemplifies this approach by delivering a complete remanufactured compressor solution compatible with multiple GM and Saab vehicles.

Detailed Product Description

The Four Seasons Reman Compressor 77548 is designed specifically for vehicles using R134a refrigerant and Pag 46 oil, ensuring compatibility with the original system specifications. Featuring a TRSA12B compressor type, it includes a clutch with a maximum diameter of 3.875 inches and a pulley diameter of approximately 98.4 mm. The pulley has four grooves and is designed for serpentine belts, providing smooth and efficient operation. The compressor is oil filled and comes with sealing washers and O-rings to maintain system integrity and prevent leaks. The heat switch and heat sensor included help regulate compressor operation and protect the system from overheating. The tangent mount style with a 40.64 mm mount distance allows for secure installation in compatible vehicles.

Common Applications and Issues Addressed

• Replacement for failing or noisy A/C compressors in Buick, Chevrolet, GMC, Isuzu, and Saab models
• Restores proper air conditioning function in vehicles like the Chevrolet Trailblazer and GMC Envoy
• Solves refrigerant leaks due to worn seals or O-rings
• Addresses clutch engagement problems with included clutch assembly
• Prevents overheating with integrated heat sensor switch

Installation Notes and Tips

• May require use of original equipment (OE) electrical connectors for proper wiring
• Mounting hardware is not included; reuse existing hardware or source separately
• Ensure system is evacuated and recharged with R134a refrigerant and compatible Pag 46 oil
• Verify pulley alignment and belt tension during installation
• Check clutch operation and electrical connections before completing installation

Quality Assurance and Warranty

This remanufactured compressor undergoes rigorous testing to meet industry standards for performance and durability. Four Seasons provides a limited warranty on the Reman Compressor 77548, covering defects in materials and workmanship. This warranty supports confidence in the product’s reliability when installed in compatible Buick, Chevrolet, GMC, Isuzu, and Saab vehicles.