GMT556A21 Aluminum Performance Radiator 1977-1987 GM C/K Pickup [21 in. Height]

Name: GMT556A21 Aluminum Performance Radiator 1977-1987 GM C/K Pickup [21 in. Height]
Brand: COLD CASE RADIATORS
SKU: 359-GMT556A21
Price: 435.54 USD
Availability: InStock

^$435⁵⁴

Ships on 09/15/2026

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GM C/K Pickup

Aluminum Performance Radiator

1977-1987 GM C/K Pickup

Automatic Transmission

21 in. H x 34.33 in. W x 3 in. D

Cold Case Radiators GMT556A21 Features:

This is the radiator that is 21 Inch high overall. See GMT556A for the 19-inch high version.These COLD-CASE radiators are Tig welded 100 percent aluminum and are absolutely beautiful. Don't buy a 3 or 4-row aluminum radiator! It doesn't cool as well as these oversize 2 row models. These radiators are originally appearing and have the correct stamping. Once painted, you'd be hard pressed to find a difference between an original versus a COLD-CASE.

100 percent TIG welded
All Aluminum
2 Rows of 1.25-inch tubes
Polished OE-style tanks
16 fins per inch
Corrugated fins that give more surface area and more thermal transfer
Pressure tested
For automatic trans
Core Height: 18.8 Inch
Core Width: 28.35 Inch
Overall Height: 21 Inch
Overall Width: 34.33 Inch
Overall Thickness: 3 Inch
Tubes: (2) 1.25 Inch Tubes
Upper Hose: 1.50 Inch
Lower Hose: 1.75 Inch

Part TypeRadiator

BrandCOLD CASE RADIATORS

Package Height8.5

Package Width25.0

Package Length39.0

Weight30.0 PG

Part CategoryPerformance Parts

Part FitmentDirect Fit

Vendor Part NumberGMT556A21

Package Qty1

Package TypeEA

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Some parts are not legal for use in California or other states with similar laws / regulations

GMT556A21 Aluminum Performance Radiator 1977-1987 GM C/K Pickup [21 in. Height]

Cold Case Radiators GMT556A21 Features:

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