Four Seasons 98559A HVAC Heater Core
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Four Seasons
 Heater Core

Four Seasons 98559A HVAC Heater Core

Brand Four Seasons 98559A
Length 6
Thickness 1-7/8
Width 8-1/2
Core Material Aluminum
Adjustable Pipe Positioning No
Core Depth IN 1.875
Core Height IN 6.000
Core Width IN 8.500
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 Chevrolet and GMC · 31 vehicles

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

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

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

Cross-references Anchor 9067, APDI 9010065 and CSF 2275 for the same application. See all 31.

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Free returns within 60 days if it doesn't fit when fitment is verified.
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Four Seasons 98559A Heater Core Overview

The Four Seasons Heater Core 98559A is an aluminum HVAC heater core built for direct replacement in select classic Chevrolet and GMC truck applications. It is specified for vehicles without air conditioning and matches the listed core dimensions for a proper service fit.

Use this heater core when servicing the heating system in a 1967-1972 Chevrolet C10 Suburban, 1967-1972 Chevrolet C20 Suburban, 1967-1972 Chevrolet K10 Suburban, 1967-1972 Chevrolet K20 Suburban, 1969-1972 Chevrolet Blazer, or 1970-1972 GMC Jimmy.

Key Features

  • Brand: Four Seasons Heater Core
  • Part number: 98559A
  • Aluminum heater core construction
  • Core dimensions: 6 in. height, 8-1/2 in. width, 1-7/8 in. thickness
  • Tube sizes: 5/8 in. and 3/4 in.
  • Meets or exceeds OEM requirements
  • Designed for vehicles without air conditioning
  • Direct-fit HVAC heater core for listed Chevrolet and GMC applications

Product Details

Four Seasons 98559A is part of the Heater Core product line and is built as an aluminum heater core for HVAC repair and replacement. The compact core measures 6.000 inches high, 8.500 inches wide, and 1.875 inches deep, with fixed pipe positioning and tube diameters of 0.625 inch and 0.750 inch. This makes it a practical replacement for classic Chevrolet Blazer, Chevrolet Suburban, and GMC Jimmy heating systems where the original core has failed or is leaking.

This part cross-references Four Seasons 98559 and APDI 9010065 for the same application.

Common Problems This Part Can Address

  • Loss of cabin heat from a leaking or restricted heater core
  • Coolant odor inside the vehicle from heater core seepage
  • Fogging or film on the windshield caused by HVAC coolant leakage
  • Reduced heater output in classic Chevrolet and GMC trucks
  • Corrosion-related failure in an aging aluminum HVAC core

Installation Notes and Tips

Verify the vehicle is one of the listed non-A/C applications before ordering. Compare the existing core dimensions, tube sizes, and pipe orientation to the specifications for Four Seasons 98559A before installation. Drain the cooling system, inspect hoses and seals, and flush the heater circuit if contamination or debris is present.

Because this heater core is listed for specific Chevrolet and GMC models, confirm fitment by year, model, and HVAC configuration before disassembly. Proper system bleeding after installation helps restore normal heater performance.

Quality Assurance

Four Seasons 98559A is listed as meeting or exceeding OEM requirements, providing an OE-style replacement option for HVAC heater core service in the specified Chevrolet and GMC applications.

Related reading

This part fits 31 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1972ChevroletBlazerN/ACompatible with models that do not have air conditioning.; Heater Core
1972ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1972ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1972ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1972ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1972GMCJimmyN/ACompatible with models that do not have air conditioning.; Heater Core
1971ChevroletBlazerN/ACompatible with models that do not have air conditioning.; Heater Core
1971ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1971ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1971ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1971ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1971GMCJimmyN/ACompatible with models that do not have air conditioning.; Heater Core
1970ChevroletBlazerN/ACompatible with models that do not have air conditioning.; Heater Core
1970ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1970ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1970ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1970ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1970GMCJimmyN/ACompatible with models that do not have air conditioning.; Heater Core
1969ChevroletBlazerN/ACompatible with models that do not have air conditioning.; Heater Core
1969ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1969ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1969ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1969ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1968ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1968ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1968ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1968ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1967ChevroletC10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1967ChevroletC20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1967ChevroletK10 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
1967ChevroletK20 SuburbanN/ACompatible with models that do not have air conditioning.; Heater Core
Directly replaces or cross-references 31 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Anchor — 9067APDI — 9010065CSF — 2275Dorman - HELP — 90670Dorman - HELP — 94559Four Seasons — 96120Four Seasons — 98559Four Seasons — 98559AGlobal Parts Distributors LLC — 1811323Global Parts Distributors LLC — 8231278260602501212791313990675545597022757091401560006156009515633393015169460302566030251913199952484061E812056GM9067H2238HT399067HT399067CZH121