Four Seasons 5571NK A/C Compressor and Component Kit

Complete A/C Kit for 1990 GM Trucks

Restore cabin cooling with the Four Seasons Complete A/C Kit 5571NK. This complete air conditioning kit includes a new compressor, accumulator, orifice tube, compressor oil, and O-rings for a service-ready repair on select 1990 Chevrolet C1500, C2500, C35, C3500, K1500, K2500, and K3500 models, plus 1990 GMC C1500, C2500, C3500, K1500, K2500, and K3500 applications.

Built for R134a systems, this Four Seasons Complete A/C Kit is organized around the core components needed for a compressor replacement on GM truck HVAC systems using an orifice tube expansion device. Part number 5571NK is a direct-fit solution for vehicles listed below.

Key Features

• Complete A/C kit with new compressor for select 1990 Chevrolet and GMC trucks
• Includes compressor oil with PAG Oil /150 specification
• Uses an orifice tube expansion device with 0.072 in. orifice diameter
• Accumulator features female O-ring inlet and male insert O-ring outlet fittings
• Designed for R134a refrigerant systems
• Limited lifetime warranty
• Four Seasons part number 5571NK

Product Details

The Four Seasons Complete A/C Kit line brings together the major components needed for a compressor-focused air conditioning repair. This kit includes 58937 new compressor, 33133 accumulator, 38638 orifice tube, 59003 oil, and O-rings. The accumulator measures 3.500 inches in diameter and 8.000 inches in length, with 0.750 inch inlet and outlet fittings. The black standard orifice tube is sized for the listed GM truck applications and supports proper refrigerant metering in R134a systems.

Use Four Seasons 5571NK when servicing 1990 Chevrolet C1500, C2500, C35, C3500, K1500, K2500, and K3500 models, as well as 1990 GMC C1500, C2500, C3500, K1500, K2500, and K3500 trucks. This part cross-references A/C service applications commonly associated with 58937 and 33133.

Common Repair Uses

• Failed or noisy A/C compressor replacement
• Loss of cooling performance in R134a truck HVAC systems
• Contaminated or worn accumulator service
• Restricted refrigerant flow at the orifice tube
• Leak-related A/C system refresh with new seals and oil

Installation Notes

Verify the vehicle’s compressor style and condenser mounting orifice tube setup before installation. Replace the accumulator and orifice tube during compressor service, and follow proper evacuation, flushing, and recharge procedures for R134a systems. Confirm oil type and system capacity against service specifications before charging.

Quality Assurance

Four Seasons 5571NK is backed by a limited lifetime warranty.