Four Seasons 33118 A/C Accumulator

Four Seasons 33118 A/C Accumulator

Four Seasons 33118 is a complete A/C accumulator for select Chevrolet Express, GMC Savana, and GM P-series applications. Built with an aluminum body and OE-style service features, it supports proper refrigerant flow management in systems that use a female inlet fitting and switch port configuration.

As part of the Four Seasons Accumulator line, this unit is built for direct-fit service on vehicles that require a replacement accumulator with a 5/8 inlet and outlet connection. It is a practical choice for restoring HVAC performance on 1998 Chevrolet Express 1500, 2500, and 3500 models, as well as 1996-1997 GMC Savana vans and earlier Chevrolet P30 and P20 chassis applications.

Key Features

• Part number 33118 from Four Seasons
• Accumulator / receiver drier category for automotive A/C service
• Aluminum construction
• Female O-ring inlet fitting with 5/8 inlet diameter
• Male insert O-ring outlet fitting with 5/8 outlet diameter
• Service port and switch port included in the housing design
• Meets or exceeds OEM requirements
• Complete unit style for direct replacement service
• Green O-ring sealing points specified for the inlet and outlet connections

Product Details

Four Seasons 33118 is an A/C accumulator used in systems that need moisture control and refrigerant storage on the low-pressure side of the HVAC circuit. The aluminum body measures 3.500 inches in diameter and 9.000 inches in length, with metric dimensions of 88.900 mm by 228.600 mm. It uses M27x2.000 inlet and outlet thread sizes and includes a 0.472-inch switch port diameter for applications that require a switch connection. This part cross-references Monroe Shocks & Struts 172980 for the same application.

Vehicle Fitment

• Fits 1998 Chevrolet Express 1500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1998 Chevrolet Express 2500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1998 Chevrolet Express 3500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1998 GMC Savana 1500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1998 GMC Savana 2500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1998 GMC Savana 3500, N/A, w/ Female Inlet Fitting; Accumulator
• Fits 1996-1997 Chevrolet Express 1500, N/A, Accumulator
• Fits 1996-1997 Chevrolet Express 2500, N/A, Accumulator
• Fits 1996-1997 Chevrolet Express 3500, N/A, Accumulator
• Fits 1993-1997 Chevrolet P30, N/A, w/ Cab Equipment; Accumulator
• Fits 1996-1997 GMC Savana 1500, N/A, Accumulator
• Fits 1996-1997 GMC Savana 2500, N/A, Accumulator
• Fits 1996-1997 GMC Savana 3500, N/A, Accumulator
• Fits 1996 GMC P3500, N/A, Excl. Motorhome; w/ Cab Equipment; Accumulator
• Fits 1993-1995 GMC P3500, N/A, w/ Cab Equipment; Accumulator
• Fits 1982-1992 Chevrolet P30, N/A, Accumulator
• Fits 1982-1989 Chevrolet P20, N/A, Accumulator

Common A/C Problems This Part Addresses

• Loss of refrigerant storage and moisture separation in the HVAC system
• Damaged or leaking accumulator housing
• Worn O-ring sealing surfaces at the inlet or outlet connections
• Service port or switch port related replacement needs
• Poor A/C performance on Chevrolet Express, GMC Savana, or GM P-series vehicles

Installation Notes

Verify the inlet and outlet fitting style, thread size, and switch port configuration before installation. Replace the specified O-rings during service, evacuate and recharge the system according to factory procedures, and confirm that the accumulator is matched to the vehicle’s cab equipment and inlet fitting requirements. Mounting hardware is not included.

Quality Assurance

Four Seasons 33118 is listed as meeting or exceeding OEM requirements for the specified applications. The Four Seasons Accumulator line is built for direct replacement service in automotive HVAC systems where correct fitment and sealing are critical.