Will the 4 Row All Aluminum Radiator fit a 1973-1991 GMC Chevy C/K Series Pickup?

Yes, the 4 Row All Aluminum Radiator for GMC Chevy C/K Jimmy fits 1973-1991 GMC Chevy C/K Series Pickups as a direct bolt-on replacement for the original equipment.

The GMC Chevy Radiator features a core size of 19″ H x 28-1/4″ W x 2 1/2″ T, with an overall footprint of 20-1/4″ H x 33-1/4″ W. This unit includes a 4-row AA5052 aluminum core, an aluminum shroud, and two 12″ fans with mounting kits. Because high-capacity 4-row units often sit taller than stock parts, you must verify that the 19″ core height clears your specific hood line. We selected this unit for our comparison because it includes a 32215G1/4Z transmission oil cooler and a thermostat relay kit, which simplifies the plumbing for automatic transmissions. The radiator uses 1 1/2″ hose connections on both the driver side (upper) and passenger side (lower) to match factory barb sizes.

What to Check Before Buying the GMC Chevy Radiator

Confirming these specific fitment details is essential for a complete radiator buyer because an incorrectly sized core can restrict coolant flow or physically interfere with other engine components. Check these points before ordering:

Before ordering, you should view the clearance requirements for a 4 row aluminum radiator to ensure proper fitment in your engine bay.

• Confirm your truck’s hood clearance allows for a 19″ core height without modification.
• Verify that the 2 1/2″ core thickness provides enough clearance for your specific AC condenser.
• Ensure your existing upper and lower radiator hoses match the 1 1/2″ inlet and outlet diameters.
• Check that the included fan shroud does not interfere with the engine block or AC compressor.
• Confirm the mounting bracket spacing on your frame matches the direct bolt-on configuration.

Comparing the GMC Chevy Radiator to Other Options

The GMC Chevy Radiator is a high-capacity cooling unit, which is a heavy-duty metal heat exchanger designed to dissipate heat from the engine coolant. This specific 4-row design is intended for owners seeking significant cooling upgrades for high-performance builds or heavy-duty towing. If you are looking for a standard street replacement that prioritizes a lower price point or a smaller profile, you may prefer a 2-row or 3-row aluminum option. Buyers who do not require the extra surface area of a 4-row core or the integrated transmission cooler may find other configurations more suitable for their specific engine output.

If you are upgrading an older truck and need a heavy-duty cooling solution that includes a transmission cooler and dedicated fans, choose this 4-row aluminum radiator.

You can also browse our guide on the best radiator for chevrolet and gmc pickup trucks to see other high-performance options.