Four Seasons 178363 A/C Compressor

Reliable A/C Compressor for Chevrolet and GMC Heavy-Duty Trucks

The Four Seasons New Compressor 178363 is engineered to restore efficient air conditioning performance in Chevrolet and GMC heavy-duty trucks. Designed specifically for models like the Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, Silverado 3500, Silverado 3500 HD, and Suburban 3500 HD, this A/C compressor ensures compatibility and durability.

• Compatible refrigerant types: R-134a or R1234yf
• Includes oil for proper lubrication
• 4-groove serpentine pulley for reliable belt engagement
• Pin-type electrical terminal with 12V coil voltage
• Clutch included with a maximum diameter of 4.31 inches
• Mounting type: 1 ear and 2 boss for secure installation
• Compressor type: 7sas17f Nippondenso design
• Includes O-rings (part numbers 24402 and 24404) for sealing

About the Four Seasons New Compressor Product Line

The Four Seasons New Compressor line offers brand-new, direct-fit A/C compressors designed to meet or exceed OEM specifications. This product line focuses on delivering reliable performance and long service life for HVAC systems in heavy-duty vehicles. The New Compressor 178363 is part of this line, providing a fresh, fully assembled compressor with clutch and oil included, ensuring a straightforward replacement process for Chevrolet and GMC trucks.

Detailed Product Description

This Four Seasons A/C compressor (part number 178363) is a Nippondenso 7sas17f type unit designed for use with R-134a or R1234yf refrigerants. It features a 4-groove serpentine pulley with a diameter of 4.31 inches, matching the OEM specifications for smooth belt operation. The included clutch and coil operate at 12 volts with a pin-type terminal and a single wire lead coil clock position, simplifying electrical connections. Mounting is secured via a 1 ear and 2 boss configuration, ensuring a precise fit on compatible Chevrolet and GMC heavy-duty truck models. The compressor comes pre-filled with oil and includes necessary O-rings for proper sealing, though mounting hardware is not included.

Common Applications and Issues Addressed

• Restores A/C cooling performance in Chevrolet Sierra 2500 HD and 3500 HD models
• Replaces worn or failed compressors in Silverado 2500 HD, 3500, and 3500 HD trucks
• Solves clutch engagement problems and pulley wear
• Addresses refrigerant leaks due to faulty seals or O-rings
• Eliminates compressor noise or failure caused by internal wear

Installation Notes and Tips

• Verify compatibility with your specific Chevrolet or GMC heavy-duty truck model before installation
• Ensure the system is properly evacuated and recharged with the correct refrigerant type (R-134a or R1234yf)
• Replace O-rings included with the compressor to prevent leaks
• Check belt condition and tension on the 4-groove serpentine pulley
• Mounting hardware is not included; reuse existing hardware or source separately

Quality Assurance and Warranty

The Four Seasons New Compressor 178363 is a brand-new unit manufactured to meet OEM standards for fit and function. It includes factory-installed oil and clutch assembly to ensure reliable operation. While specific warranty details vary, Four Seasons typically offers coverage against defects in materials and workmanship. Consult product documentation or supplier for exact warranty terms.