Four Seasons 90056 HVAC Heater Core - Front
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Four Seasons
 Heater Core

Four Seasons 90056 HVAC Heater Core - Front

Brand Four Seasons 90056
Position Front
Length 8-1/4
Thickness 1
Width 7
Core Material Aluminum
Adjustable Pipe Positioning No
Core Depth IN 1.000
Core Height IN 8.250
Core Width IN 7.000
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 Chevrolet and GMC · 20 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. A direct HVAC component that restores cabin heat performance.

Cross-references APDI 9010033, Four Seasons 90056 and Global Parts Distributors LLC 8231380 for the same application. See all 19.

$55.54Free shipping
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Free returns within 60 days if it doesn't fit when fitment is verified.
Not what you need? See all HVAC Heater Core options

Four Seasons 90056 Heater Core

The Four Seasons 90056 heater core is an aluminum HVAC replacement built for front heater applications in select Chevrolet Astro and GMC Safari vans. With OE-matching dimensions and direct-fit construction, it supports consistent cabin heat performance for 1996-2005 models.

Key Features

  • Aluminum heater core construction
  • Core dimensions: 8-1/4 in. height, 7 in. width, 1 in. depth
  • Tube sizes: 0.625 in. and 0.750 in.
  • Meets or exceeds OEM requirements
  • Front HVAC heater core application
  • Four Seasons 90056 replacement part number for direct identification

Product Details

Four Seasons Heater Core line components are built for HVAC service where accurate fit and heat transfer matter. This aluminum heater core is specified for front-position installations and is sized to match the listed application, helping restore proper coolant-to-air heat exchange in the heater box. Compatible With 1996-2005 Chevrolet Astro, front heater core, and 1996-2005 GMC Safari, front heater core. This part cross-references Spectra Premium (e.g., 93056) for the same application.

Common Problems It Can Help Address

  • Weak or inconsistent cabin heat
  • Coolant odor inside the vehicle
  • Leaking heater core symptoms
  • Restricted heat output from a clogged core
  • HVAC performance loss in the front heater circuit

Installation Notes

Verify the heater core dimensions, tube sizes, and front-position fitment before installation. On Chevrolet Astro and GMC Safari applications, access typically requires HVAC case service, so confirm the vehicle’s heater box configuration and coolant line routing before removal. Flush the cooling system if contamination or debris is present to help protect the replacement core.

Quality Assurance

This Four Seasons heater core meets or exceeds OEM specifications for the listed application. The aluminum construction and application-specific sizing support reliable HVAC service for the 1996-2005 Chevrolet Astro and GMC Safari platform.

Related reading

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
2005ChevroletAstroFrontHeater Core
2005GMCSafariFrontHeater Core
2004ChevroletAstroFrontHeater Core
2004GMCSafariFrontHeater Core
2003ChevroletAstroFrontHeater Core
2003GMCSafariFrontHeater Core
2002ChevroletAstroFrontHeater Core
2002GMCSafariFrontHeater Core
2001ChevroletAstroFrontHeater Core
2001GMCSafariFrontHeater Core
2000ChevroletAstroFrontHeater Core
2000GMCSafariFrontHeater Core
1999ChevroletAstroFrontHeater Core
1999GMCSafariFrontHeater Core
1998ChevroletAstroFrontHeater Core
1998GMCSafariFrontHeater Core
1997ChevroletAstroFrontHeater Core
1997GMCSafariFrontHeater Core
1996ChevroletAstroFrontHeater Core
1996GMCSafariFrontHeater Core
Directly replaces or cross-references 19 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
APDI — 9010033Four Seasons — 90056Global Parts Distributors LLC — 8231380Haynes — 96008OSC — 98056Spectra Premium — 93056Standard Ignition — 69202796883983565530567091991560079181121766017861119305652474642ACD1560079HC0333HT398356