Four Seasons 3711NK A/C Compressor and Component Kit

Complete A/C Kit for Silverado and Sierra

Four Seasons 3711NK is a Complete A/C Kit built for select Chevrolet Silverado 1500 and GMC Sierra 1500 applications. It combines the major air conditioning components needed for a full compressor-side service, including a new compressor, accumulator, orifice tube, compressor oil, and O-rings.

Compatible with 2003-2006 Chevrolet Silverado 1500 and 2003-2006 GMC Sierra 1500 applications listed below, this kit is configured for R134a systems and uses a standard black orifice tube setup.

Key Features

• Four Seasons Complete A/C Kit, part number 3711NK
• Includes 78348 new compressor, 83207 accumulator, 38638 orifice tube, 59007 oil, and O-rings
• Built for R134a refrigerant systems
• Orifice tube style: standard; orifice tube color: black
• Orifice tube diameter: 0.072 in.
• Accumulator dimensions: 3.500 in. diameter and 8.000 in. length
• Accumulator inlet and outlet fitting type: P-Nut fitting
• Compressor oil included
• Limited lifetime warranty

Product Details

The Four Seasons Complete A/C Kit line is organized as a full-service replacement solution for air conditioning repairs that require multiple matched components. This 3711NK kit is specified for vehicles using a 10S17F compressor and a 13 mm orifice tube diameter, with fitment notes that also call out a black orifice tube and, on 2006 applications, a drier without a service port. For Silverado 1500 and Sierra 1500 owners, that makes part number 3711NK a direct-match option for restoring the core A/C circuit with components selected to work together.

This part cross-references Four Seasons 3711NK for the same application.

What It Helps Address

• Loss of cabin cooling from a worn or failed compressor
• Restricted refrigerant flow caused by a clogged or incorrect orifice tube
• Moisture control issues related to an aging accumulator
• Low-side contamination from degraded internal A/C components
• Service repeat failures when only one major A/C part is replaced

Installation Notes and Tips

Verify compressor style, orifice tube diameter, and accumulator configuration before installation. This kit is listed for 2003-2006 Chevrolet Silverado 1500 and 2003-2006 GMC Sierra 1500 applications with the noted compressor and drier specifications. Replace the accumulator and orifice tube during service, evacuate the system, and recharge with the correct R134a refrigerant charge after leak checking and oil verification.

Quality Assurance

Four Seasons 3711NK carries a limited lifetime warranty. The Complete A/C Kit format helps ensure the compressor, accumulator, orifice tube, and oil are matched for the listed Silverado 1500 and Sierra 1500 applications.