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Cold Case Performance Aluminum Radiators GMT556A21-1 Radiator, Performance, Aluminum, Polished, Downflow, 2 Row, with Transmission Cooler, 1.5 in. Lower Outlet, Chevrolet, GMC, Each

SKU: RADGMT556A21-1

Radiators

Cold Case Performance Aluminum Radiators GMT556A21-1 Radiator, Performance, Aluminum, Polished, Downflow, 2 Row, with Transmission Cooler, 1.5 in. Lower Outlet, Chevrolet, GMC, Each

SKU: RADGMT556A21-1

Radiators
A$1,381.16
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Cold-Case performance aluminum radiators are available and affordable for all. These high-quality, tube-and-fin performance radiators are true OE styles for most applications. Each Cold-Case design distributes fluid more evenly, eliminating hot and cold spots. Also, the massive cores take up the entire width of their tanks, so you get the most efficient cooling possible. The radiators drop-in without modifications needed (on most) and look original. Plus, Cold-Case stands behind its quality and research with a limited lifetime warranty on their products.

All Cold-Case radiators feature:

* Lightweight, efficient aluminum construction
* 100 percent TIG-welded
* Internally welded filler necks offer a clean, factory look
* Two oversized cooling rows for increased capacity
* 1 in. to 1 1/4 in. tubes for higher volume
* Works with factory filler cap
* Includes OEM-style petcock
* 42.7 percent lighter than comparable copper radiators
* 30 percent thicker materials than no-name aluminum radiators
* 60-day COOL guarantee

Part Type

Radiators

Data: v4.2 - Upd: 2026-10-02 01:36:32

Specifications

Product Attributes - Brand
Cold Case Radiators
Product Attributes - Manufacturer's Part Number
GMT556A21-1
Product Attributes - Part Type
Radiators
Product Attributes - Product Line
Cold Case Performance Aluminum Radiators
Product Attributes - UPC
846861012956
Product Attributes - Radiator Material
Aluminum
Product Attributes - Radiator Style
Crossflow
Product Attributes - Transmission Cooler
Yes
Product Attributes - Inlet Location
Upper driver side
Product Attributes - Outlet Location
Lower passenger side
Product Attributes - Overall Width (in.)
34.33 in.
Product Attributes - Overall Height (in.)
21.00 in.
Product Attributes - Overall Thickness (in.)
3.00
Product Attributes - Row Quantity
2
Product Attributes - Radiator Finish
Polished
Product Attributes - Core Width (in.)
28.35 in.
Product Attributes - Core Height (in.)
18.80 in.
Product Attributes - Radiator Inlet Size
1.250 in.
Product Attributes - Radiator Outlet Size
1.500 in.
Product Attributes - Trans Cooler Line Connection
1/2 in.-20 inverted flare
Product Attributes - Trans Cooler Adapter Fittings Included
No
Product Attributes - Tube Size
1 1/4 in.
Product Attributes - Fan Included
No
Product Attributes - Radiator Cap Included
Yes
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
For models with lower hose diameter of 1.5 inches.

Reference Information

Brand Name/s Cold Case Radiators
StreetFX SKU radGMT556A21-1
SFX Item ID 5025423
Supplier Item Code 5025423
Manufacturer SKU GMT556A21-1
Manufacturer UPC 846861012956
Alternative References CCRGMT556A21-1

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelCUSTOM DELUXE
    Beginning Year1987
    Ending Year1987
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelCUSTOM DELUXE
    Beginning Year1987
    Ending Year1987
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelCUSTOM DELUXE
    Beginning Year1987
    Ending Year1987
    Engine Size6.2L/379
    Engine FamilyCHEVY V8 DIESEL
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelSILVERADO
    Beginning Year1987
    Ending Year1987
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelSILVERADO
    Beginning Year1987
    Ending Year1987
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelBLAZER
    SubmodelSILVERADO
    Beginning Year1987
    Ending Year1987
    Engine Size6.2L/379
    Engine FamilyCHEVY V8 DIESEL
    Engine TypeV8
    TransmissionAutomatic
    Drivetrain4WD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1978
    Engine Size4.8L/292
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1979
    Engine Size5.7L/350
    Engine FamilyOldsmobile diesel V8
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1980
    Engine Size4.1L/250
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1980
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1980
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1978
    Ending Year1980
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1980
    Ending Year1980
    Engine Size4.8L/292
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelBIG TEN
    Beginning Year1980
    Ending Year1980
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1980
    Engine Size4.8L/292
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1980
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1980
    Engine Size6.6L/400
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1980
    Engine Size7.4L/454
    Engine FamilyChevy big block Mark IV
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1981
    Engine Size4.1L/250
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1977
    Ending Year1981
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1978
    Ending Year1981
    Engine Size5.7L/350
    Engine FamilyOldsmobile diesel V8
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCHEYENNE
    Beginning Year1981
    Ending Year1981
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM
    Beginning Year1981
    Ending Year1981
    Engine Size5.0L/305
    Engine FamilyChevy small block Gen I
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM
    Beginning Year1981
    Ending Year1981
    Engine Size5.7L/350
    Engine FamilyOldsmobile diesel V8
    Engine TypeV8
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.
  • UniversalNo
    MakeCHEVROLET
    ModelC10
    SubmodelCUSTOM
    Beginning Year1981
    Ending Year1984
    Engine Size4.1L/250
    Engine FamilyGM L6 GAS
    Engine TypeL6
    TransmissionAutomatic
    DrivetrainRWD
    Application NotesFor models with lower hose diameter of 1.5 inches.

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