Four Seasons 90485 HVAC Heater Core

Four Seasons 90485 Heater Core Overview

The Four Seasons 90485 heater core is an aluminum HVAC heater core built for direct-fit replacement in select GM vehicles. It is engineered to meet or exceed OEM requirements and is sized for applications that use an 8-inch by 6-1/4-inch core with a 1-inch depth.

Compatible With Chevrolet Lumina, Chevrolet Monte Carlo, Chevrolet Malibu, Oldsmobile Cutlass Supreme, Buick Regal, Oldsmobile Cutlass, Pontiac Grand Prix, and Oldsmobile Cutlass Ciera applications that match the listed fitment.

• Aluminum heater core construction
• Core dimensions: 8 in. height, 6-1/4 in. width, 1 in. depth
• Tube sizes: 0.625 in. and 0.750 in.
• Meets or exceeds OEM specifications
• Direct replacement for select HVAC heater core applications

Product Line Details

Four Seasons Heater Core products are focused on HVAC replacement parts for passenger vehicles. Part number 90485 is part of the Four Seasons Heater Core line and is built as an aluminum heater core for vehicles that require this specific size and tube configuration. This part number also cross-references Spectra Premium 94485 for the same application.

Fitment Details

• Fits 1990-2001 Chevrolet Lumina, Heater Core
• Fits 1995-1999 Chevrolet Monte Carlo, Heater Core
• Fits 1997 Chevrolet Malibu, Heater Core
• Fits 1988-1997 Oldsmobile Cutlass Supreme, Heater Core
• Fits 1988-1996 Buick Regal, Heater Core
• Fits 1988-1996 Oldsmobile Cutlass, Heater Core
• Fits 1988-1996 Pontiac Grand Prix, Heater Core
• Fits 1994 Oldsmobile Cutlass Ciera, Heater Core; compatible with models that do not have air conditioning

What This Heater Core Helps Address

• Loss of cabin heat from a leaking or restricted heater core
• Coolant odor inside the vehicle caused by heater core seepage
• Fogging or film on the inside of the windshield related to HVAC coolant leakage
• Uneven or weak heat output from the climate control system
• HVAC performance issues tied to an aging aluminum heater core

Installation Notes

Verify core dimensions, tube size, and vehicle fitment before installation. This heater core uses fixed pipe positioning, so confirm the inlet and outlet alignment against the original unit. On the 1994 Oldsmobile Cutlass Ciera application, confirm the vehicle is the non-air-conditioning model listed in the fitment notes.

Quality Assurance

Four Seasons lists this heater core as meeting or exceeding OEM specifications. The aluminum construction and application-specific sizing support a direct replacement approach for the listed Chevrolet, Buick, Oldsmobile, and Pontiac models.