Four Seasons 98533 HVAC Heater Core
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Four Seasons
 Heater Core

Four Seasons 98533 HVAC Heater Core

Brand Four Seasons 98533
Length 9-1/8
Thickness 1-7/8
Width 6
Core Material Aluminum
Adjustable Pipe Positioning No
Core Depth IN 1.875
Core Height IN 9.125
Core Width IN 6.000
Description Heater cores
Meets / Exceeds OEM? Yes
Style Aluminum heater core
Tube 1 IN 0.625
Tube 1 MM 15.875
Tube 2 IN 0.750
Tube 2 MM 19.050
Type Heater core /aluminum
Product line Heater Core
Fits Buick, Oldsmobile, and Pontiac · 57 vehicles

OE direct replacement. Meets or exceeds OEM requirements for a confident fit and function.

Aluminum construction. Lightweight core material helps promote efficient heat transfer.

Heater core. Built for HVAC systems to restore cabin heat performance.

Cross-references Anchor 9059, APDI 9010326 and Four Seasons 98533 for the same application. See all 35.

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Not what you need? See all HVAC Heater Core options

Four Seasons 98533 Heater Core Overview

Four Seasons 98533 is an aluminum HVAC heater core built for direct replacement in select classic GM applications. With a core height of 9-1/8 inches, width of 6 inches, and thickness of 1-7/8 inches, it is sized for vehicles that require a compact heater core assembly and direct OE-style fitment.

This heater core fits 1964-1969 Buick LeSabre, 1964-1968 Oldsmobile 98, 1965-1968 Oldsmobile Delta 88, 1964-1968 Pontiac Grand Prix, 1965-1969 Pontiac Bonneville, and 1965-1969 Pontiac Catalina, with notes for models that do not have air conditioning. Four Seasons 98533 also cross-references Spectra Premium 94533 for the same application.

Key Features

  • Aluminum heater core construction for HVAC service replacement
  • Core dimensions: 9-1/8 in. height, 6 in. width, 1-7/8 in. thickness
  • Tube sizes: 0.625 in. and 0.750 in.
  • Meets or exceeds OEM requirements
  • Direct-fit style for select Buick, Oldsmobile, and Pontiac vehicles
  • Four Seasons heater core part number 98533

Detailed Description

Four Seasons 98533 is part of the Four Seasons Heater Core line and is engineered as an aluminum heater core replacement for vintage GM HVAC systems. The aluminum core material supports efficient heat transfer in a compact design, while the listed dimensions and tube sizes help match the original heater box configuration. This part number is used in applications across Buick LeSabre, Oldsmobile 98 and Delta 88, and Pontiac Grand Prix, Bonneville, and Catalina models from the mid-1960s through 1969, with fitment limited to vehicles without air conditioning where noted.

Common Problems This Part Addresses

  • Loss of cabin heat from a leaking or clogged heater core
  • Coolant odor inside the passenger compartment
  • Fogging or film on the windshield caused by heater core seepage
  • Restricted coolant flow through the HVAC heater circuit
  • Uneven or weak heat output in classic GM vehicles

Installation Notes and Tips

Verify heater box dimensions, tube orientation, and hose connection sizes before installation. This part does not have adjustable pipe positioning, so alignment should be checked against the original unit before final assembly. Flush the cooling system and inspect hoses, clamps, and the heater control valve or related HVAC components during replacement to reduce repeat failures.

Quality Assurance

Four Seasons 98533 is listed as meeting or exceeding OEM requirements for the specified applications. The Four Seasons Heater Core line is built for direct replacement service in HVAC systems where correct fit and material specification are important.

Related reading

This part fits 57 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelBody TypeLitersCylindersPositionNotes
1969BuickLeSabre—Sedan5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1969BuickLeSabre—Coupe5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1969BuickLeSabre—Convertible5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1969BuickLeSabre—Hardtop5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1969PontiacBonneville————N/ACompatible with models that do not have air conditioning.; Heater Core
1969PontiacCatalina————N/ACompatible with models that do not have air conditioning.; Heater Core
1968BuickLeSabre—Sedan5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1968BuickLeSabre—Wagon5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1968BuickLeSabre—Coupe5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1968BuickLeSabre—Convertible5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1968BuickLeSabre—Hardtop5.7LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1968Oldsmobile98————N/ACompatible with models that do not have air conditioning.; Heater Core
1968OldsmobileDelta 88————N/ACompatible with models that do not have air conditioning.; Heater Core
1968PontiacBonnevilleBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1968PontiacCatalinaBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1968PontiacCatalinaVentura———N/ACompatible with models that do not have air conditioning.; Heater Core
1968PontiacGrand Prix————N/ACompatible with models that do not have air conditioning.; Heater Core
1967BuickLeSabre—Wagon5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1967BuickLeSabre—Sedan5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1967BuickLeSabre—Coupe5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1967BuickLeSabre—Convertible5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1967BuickLeSabre—Hardtop5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1967Oldsmobile98————N/ACompatible with models that do not have air conditioning.; Heater Core
1967OldsmobileDelta 88————N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacBonnevilleBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacCatalina————N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacCatalinaBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacCatalina2+2———N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacCatalinaVentura———N/ACompatible with models that do not have air conditioning.; Heater Core
1967PontiacGrand Prix————N/ACompatible with models that do not have air conditioning.; Heater Core
1966BuickLeSabre—Wagon5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1966BuickLeSabre—Sedan5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1966BuickLeSabre—Coupe5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1966BuickLeSabre—Convertible5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1966BuickLeSabre—Hardtop5.6LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1966Oldsmobile98————N/ACompatible with models that do not have air conditioning.; Heater Core
1966OldsmobileDelta 88————N/ACompatible with models that do not have air conditioning.; Heater Core
1966PontiacBonnevilleBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1966PontiacCatalinaBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1966PontiacCatalina2+2———N/ACompatible with models that do not have air conditioning.; Heater Core
1966PontiacCatalinaVentura———N/ACompatible with models that do not have air conditioning.; Heater Core
1966PontiacGrand Prix————N/ACompatible with models that do not have air conditioning.; Heater Core
1965BuickLeSabre—Wagon4.9LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1965BuickLeSabre—Sedan4.9LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1965BuickLeSabre—Coupe4.9LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1965BuickLeSabre—Convertible4.9LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1965BuickLeSabre—Hardtop4.9LV8N/ACompatible with models that do not have air conditioning.; Heater Core
1965Oldsmobile98————N/ACompatible with models that do not have air conditioning.; Heater Core
1965OldsmobileDelta 88————N/ACompatible with models that do not have air conditioning.; Heater Core
1965PontiacBonnevilleBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1965PontiacCatalinaBase———N/ACompatible with models that do not have air conditioning.; Heater Core
1965PontiacCatalina2+2———N/ACompatible with models that do not have air conditioning.; Heater Core
1965PontiacCatalinaVentura———N/ACompatible with models that do not have air conditioning.; Heater Core
1965PontiacGrand Prix————N/ACompatible with models that do not have air conditioning.; Heater Core
1964Oldsmobile98————N/ACompatible with models that do not have air conditioning.; Heater Core
1964OldsmobileStarfire————N/ACompatible with models that do not have air conditioning.; Heater Core
1964PontiacGrand Prix————N/ACompatible with models that do not have air conditioning.; Heater Core
Directly replaces or cross-references 35 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 9059APDI — 9010326Four Seasons — 98533Global Parts Distributors LLC — 1812072OSC — 2148Spectra Premium — 94533904190144904101570172501142791043990413990433990443990513990595545337021447021487091233004812300481330048153004854302182531570176603559GM9041H2266HT399041HT399044HT399051HT399059ZH114