Four Seasons 178359 A/C Compressor

Reliable A/C Compressor for GMC Sierra 1500

The Four Seasons New Compressor 178359 is designed to restore efficient air conditioning performance in your GMC Sierra 1500. Engineered to meet OEM specifications, this A/C compressor ensures compatibility and durability for your vehicle's HVAC system.

• Compatible with GMC Sierra 1500 models
• Refrigerant type: R134a and R1234yf
• Includes oil for optimal lubrication
• 4-groove serpentine pulley with 4.250-inch diameter
• Clutch included for seamless operation
• Denso compressor type with 12V coil voltage
• Electronic Control Valve (ECV) included for precise system control
• Mounting type: 2 ear & 1 tangent for secure fit
• Pin-type connector with ECV harness compatibility
• New unit, part number 178359

About the Four Seasons New Compressor Line

The Four Seasons New Compressor product line offers brand-new, direct replacement compressors designed to meet or exceed original equipment standards. This line focuses on providing reliable HVAC components that integrate seamlessly with vehicle systems, such as the Denso compressor type featured in part number 178359. The New Compressor line is engineered for durability and performance, ensuring your GMC Sierra 1500’s air conditioning system operates efficiently.

Detailed Product Description

This Four Seasons A/C compressor is specifically designed for the GMC Sierra 1500, utilizing refrigerants R134a and R1234yf to accommodate modern HVAC systems. The unit comes pre-filled with oil to maintain proper lubrication and reduce wear. Featuring a 4-groove serpentine pulley with a 4.250-inch outside diameter, it matches the original pulley specifications for smooth belt operation. The included clutch and 12V coil voltage ensure reliable engagement and disengagement of the compressor. The mounting system uses a 2 ear & 1 tangent design for secure installation, while the pin-type connector and ECV harness compatibility provide straightforward electrical connections. The electronic control valve enhances system efficiency by regulating refrigerant flow precisely.

Common Issues Addressed by This Compressor

• Loss of A/C cooling performance in GMC Sierra 1500
• Compressor clutch failure or slipping
• Refrigerant leaks due to worn seals or O-rings
• Noise or vibration from a failing compressor pulley
• Electrical issues related to coil or connector faults

Installation Notes and Tips

Ensure the system is properly evacuated and recharged with the correct refrigerant type (R134a or R1234yf) when replacing the compressor. Verify the serpentine belt condition and alignment with the 4-groove pulley. Use the included slim line sealing washers (O-rings 24402 and 24404) to prevent leaks. Since mounting hardware is not included, retain original bolts or source compatible fasteners. Confirm electrical connections match the pin-type connector and ECV harness for proper operation.

Quality Assurance and Warranty

The Four Seasons New Compressor 178359 is a new, direct replacement part manufactured to meet OEM standards. It includes essential components such as oil and clutch to ensure immediate functionality. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Always consult the product documentation or supplier for exact warranty terms.