Four Seasons 1183NK A/C Compressor and Component Kit - Front

Complete A/C Kit for Classic GM Trucks

Four Seasons 1183NK is a complete A/C compressor kit for R134a systems that includes the major service components needed for a full air conditioning repair. It combines a new compressor, accumulator, orifice tube, compressor oil, and O-rings for a direct-fit repair on select Chevrolet and GMC applications.

Compatible With 1985-1990 Chevrolet and GMC truck and SUV platforms, including Chevrolet C10, C20, C35, K10, K20, K30, R10, R20, R30, V10, V20, V30, Blazer, and Suburban models, plus GMC C1500, C2500, C3500, K1500, K2500, K3500, Jimmy, R1500, R2500, R3500, V1500, V2500, and V3500 applications. Four Seasons 1183NK is built for vehicles using LTR4 or R4 compressor configurations listed in the fitment data.

Key Features

• Complete air conditioning kit with new compressor
• Includes accumulator, orifice tube, PAG oil, and O-rings
• Uses PAG Oil /150 for R134a service
• Orifice tube specification: 0.072 in., white, standard style
• Receiver drier/accumulator with female O-ring inlet and male insert O-ring outlet
• Limited lifetime warranty
• Four Seasons 1183NK cross-references 520115 for the same application

Product Details

The Four Seasons Complete A/C Kit line is built to simplify compressor replacement by bundling the core refrigeration components in one service package. This kit is centered around a new compressor and matched service parts, helping restore proper refrigerant flow, system sealing, and moisture control in R134a-equipped HVAC systems. The included accumulator measures 3.500 inches in diameter and 9.000 inches in length, with 0.750-inch inlet and outlet fittings.

For fitment, this kit covers a broad range of classic Chevrolet and GMC trucks and SUVs from 1985 through 1990. Applications include 1987-1988 Chevrolet Blazer, 1987-1988 GMC Jimmy, 1985-1987 Chevrolet C20, and 1989 Chevrolet and GMC R/V-series heavy-duty trucks, along with multiple C/K-series and Suburban configurations. Four Seasons 1183NK is a practical choice when servicing aging GM A/C systems that require a compressor kit matched to the original vehicle configuration.

Common Problems This Kit Can Address

• Loss of cabin cooling from compressor wear or failure
• Restricted refrigerant flow caused by a worn or incorrect orifice tube
• Moisture contamination after opening the A/C system
• Leaking seals or O-rings at service connections
• Poor system performance after a compressor replacement

Installation Notes and Tips

Before installation, verify the compressor style, pulley configuration, and vehicle application against the fitment notes. Replace the accumulator and orifice tube whenever the system has been opened or the compressor has failed, and evacuate the system before recharging with R134a. Use the specified PAG Oil /150 and confirm all sealing surfaces are clean before assembly.

Quality Assurance

Four Seasons 1183NK is backed by a limited lifetime warranty. The kit is assembled with the listed service components for a complete A/C repair on confirmed Chevrolet and GMC applications, including classic C/K-series trucks, Blazer, Jimmy, and Suburban models.