Four Seasons 33137 A/C Accumulator

Four Seasons 33137 A/C Accumulator Overview

The Four Seasons 33137 A/C accumulator is a complete aluminum replacement built for HVAC systems that use a service port and switch port. It is engineered to meet or exceed OEM requirements and is listed for 1994 Chevrolet Astro and 1994 GMC Safari applications.

For buyers searching for a 1994 Chevrolet Astro A/C accumulator or a 1994 GMC Safari accumulator replacement, this Four Seasons 33137 unit provides the correct inlet and outlet configuration for service-focused HVAC repair.

Key Features

• Four Seasons Accumulator line, part number 33137
• Complete unit construction in aluminum
• Female O-ring inlet fitting with 5/8 in. inlet diameter
• Male insert O-ring outlet fitting with 5/8 in. outlet size
• Service port and switch port included in the housing
• Meets or exceeds OEM specifications
• Body diameter: 3.500 in. / 88.900 mm
• Body length: 9.000 in. / 228.600 mm

Product Details

The Four Seasons 33137 accumulator is part of the brand’s Accumulator product line and is built as a direct-fit HVAC component for accumulator/receiver drier service. It uses an aluminum body with M27x2.000 inlet and outlet thread sizes, plus green O-ring sealing points for the inlet and outlet connections. This configuration supports proper refrigerant system routing on the 1994 Chevrolet Astro and 1994 GMC Safari.

This part cross-references Gates 21637 and UAC RD1637C for the same application.

Common Repair Uses

• Replacing a leaking or damaged A/C accumulator housing
• Restoring refrigerant storage and moisture control in the HVAC system
• Addressing poor A/C performance caused by restricted or worn accumulator components
• Repairing service-port or switch-port related accumulator issues
• Correcting fitment concerns during 1994 Chevrolet Astro and 1994 GMC Safari A/C service

Installation Notes

Verify inlet and outlet thread sizes, O-ring sealing surfaces, and port locations before installation. Replace the O-rings with clean, correct-spec seals during assembly and confirm the system is evacuated and recharged according to vehicle service procedures. Mounting hardware is not included.

Quality Assurance

Four Seasons lists this accumulator as meeting or exceeding OEM requirements, making it a technical replacement choice for HVAC repair work on the 1994 Chevrolet Astro and 1994 GMC Safari. The aluminum construction and complete-unit design support consistent fitment for accumulator service.