1967–1976 Chevy/GMC Truck Radiator | Cold Case GMT558 Options

The Cold Case GMT558 aluminum radiator family offers two oversized 1.25-inch tube rows, OE-style stamped tanks, and a choice of polished or Black Night Rider finishes for Chevy/GMC trucks. Both versions are specified for automatic transmissions.

Check fitment before ordering

The supplier describes these radiators for 1967–1976 Chevy/GMC trucks, but lists direct fitment specifically for 1967–1972 GM trucks. Fitment for 1973–1976 requires confirmation before ordering. Compare the dimensions, hose connections, and mounting requirements below with your truck.

Build a radiator, fan & shroud package

Looking to choose your cooling components together? Visit our Radiator, Fan & Shroud Kit Builder. Review the available radiator and shroud options, selected kit contents, and fitment before ordering.

Matching dual 14-inch fan shroud

Pair your radiator with FMG's dual 14-inch fan shroud for Cold Case GMT558. The shroud listing specifies compatibility with both GMT558A and GMT558AB. Confirm engine and accessory clearance before ordering.

This is an FMG aftermarket shroud, not a Cold Case-manufactured part. The shroud is sold separately; fans and installation accessories are not included. See the shroud listing for compatible fan options, or compare Monty's independent fan CFM test results before choosing your fans.

Already have your radiator? Use our Shroud & Fan Kit Builder to choose your shroud and fans together. The radiator is sold separately from this shroud-and-fan kit. Review your selected kit contents and installation requirements before ordering.

Choose your finish

• GMT558A — Polished: Polished OE-style tanks with original-appearing stamping. The supplier notes that the radiator can be painted for a more original appearance. Previous part number: RPE558A.
• GMT558AB — Black Night Rider: Black powder-coated aluminum with OE-style stamped tanks for a stock-appearing finish. The supplier specifies use with 4-core mounting brackets and insulators, or modification of the 3-core version, and states that this version works with the factory fan shroud. Transmission cooler fitting: 5/16-inch inverted flare.

Shared construction and cooling features

• 100% TIG-welded aluminum construction.
• Two rows of oversized 1.25-inch tubes. The supplier positions this design as a cooling alternative to 3- and 4-row aluminum radiators.
• 16 fins per inch.
• Corrugated fins provide additional surface area for heat transfer.
• Pressure tested.
• Specified for automatic transmissions.

Dimensions and hose connections

The following specifications apply to both GMT558A and GMT558AB:

• Core height: 17.25 inches.
• Core width: 28.35 inches.
• Overall height: 18.6 inches.
• Overall width: 34 inches.
• Overall thickness: 3 inches.
• Tubes: Two rows of 1.25-inch tubes.
• Upper hose connection: 1.50 inches.
• Lower hose connection: 1.77 inches.

Transmission cooler fitting: The supplier lists a 5/16-inch inverted flare fitting for GMT558AB. A fitting size is not provided in the current GMT558A specifications; confirm before ordering if needed.

Supplier warranty: Limited Lifetime Warranty.

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