Sale

Cold Case

21-Inch Aluminum Radiator

$831.05 $692.54 Save $138.51

SKU: GMT556A21K

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Cold Case Radiators 21" Aluminum Performance Radiator (GMT556A21K) is engineered to maintain optimal coolant temperatures for your 1977-1987 Chevrolet C10, especially during demanding use. Constructed from 100% TIG-welded aluminum, this radiator incorporates dual 12-inch fans and shrouds that deliver an impressive airflow of up to 3,200 CFM per fan, ensuring efficient cooling. It features two 1-1/4 inch tubes and 16 corrugated fins per inch, which increase surface area and enhance thermal transfer for superior heat dissipation. The radiator also boasts polished OE-style tanks. Key specifications include a core height of 18.8 inches, a core width of 28.35 inches, and an overall thickness of 3 inches. The overall dimensions are 21 inches in height and 34.33 inches in width. The upper hose connection is 1-1/2 inches, the lower hose connection is 1-3/4 inches, and it includes a 5/16-inch inverted flare fitting for the transmission cooler.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCold Case
Part NumberGMT556A21K
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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