Four Seasons 4138NK A/C Compressor and Component Kit - Front

Complete A/C Kit for GM Trucks and SUVs

Restore cabin cooling with the Four Seasons Complete A/C Kit 4138NK. This complete air conditioning kit includes a new compressor, accumulator, orifice tube, oil, and O-rings for a direct-service repair on select GM applications using R134a refrigerant.

Built around the Four Seasons Complete A/C Kit line, this package is organized for a full compressor-side refresh rather than a single-component replacement. It is a practical choice for 2001-2006 Chevrolet Silverado, Tahoe, Suburban, Avalanche, and GMC Sierra, Yukon, and related Cadillac Escalade models that require the listed compressor and orifice-tube configuration.

Key Features

• Four Seasons part number 4138NK
• Complete air conditioning kit with new compressor
• Includes compressor oil and O-rings
• Uses an orifice tube expansion device
• R134a refrigerant system application
• Accumulator with P-nut inlet and outlet fittings
• Limited lifetime warranty

Product Details

This kit includes compressor 78377, accumulator 83208, orifice tube 38644, oil 59007, and O-rings. The compressor oil is included, and the system uses a gray porous orifice tube with a 0.072 in. diameter. The accumulator measures 3.500 in. in diameter and 8.000 in. in length, with P-nut fittings at both inlet and outlet. This part cross-references Davico Mfg 520563 for the same application.

Use Four Seasons 4138NK when servicing GM trucks and SUVs that call for a complete A/C compressor kit with the specified 10S17F or 10S20F compressor setup, depending on vehicle configuration. It is a focused repair solution for Chevrolet Silverado and GMC Sierra platforms, along with Cadillac Escalade, Chevrolet Tahoe, Suburban, and GMC Yukon applications listed below.

What This Kit Helps Fix

• Loss of cabin cooling from a worn or failed compressor
• Contaminated or low refrigerant-side performance after compressor failure
• Restricted refrigerant flow caused by a clogged or incorrect orifice tube
• Moisture-related A/C system issues tied to an aging accumulator
• Leak points at serviceable seals and O-rings during A/C repair

Installation Notes

• Verify compressor style, orifice tube diameter, and accumulator fitting type before installation.
• Confirm the vehicle uses R134a refrigerant and the listed front or N/A position application.
• Replace the orifice tube and accumulator when servicing a failed compressor to help complete the repair correctly.
• Follow proper evacuation, flushing, and recharge procedures for the vehicle’s A/C system.

Fitment and Quality Assurance

Compatible with select 2001-2006 Chevrolet and GMC trucks and SUVs, including Fits 2006 Chevrolet Silverado 1500, N/A; Fits 2006 GMC Sierra 1500, N/A; and Fits 2001-2005 Chevrolet Tahoe, Front. Additional listed applications include 2006 Cadillac Escalade, 2006 Chevrolet Avalanche 1500, 2006 GMC Yukon XL 2500, and other GM models shown in the fitment data.

Four Seasons 4138NK is backed by a limited lifetime warranty.