3-Row Radiator with Cap for Chevy C10 C20 C30 K10 K20 K30 1975-1986, Suburban Blazer GMC Jimmy, Replace CU716, 56mm Core BDFHYK

Restore and upgrade cooling performance with this direct-fit replacement radiator for select classic Chevrolet and GMC truck, SUV, and van applications. Built with a  3-row, 56 mm aluminum core and supplied with a radiator cap, it is designed to replace an aged, leaking, clogged, corroded, or damaged factory radiator and help maintain stable engine temperature during daily driving, towing, hauling, highway use, warm-weather operation, and classic vehicle restoration. 

Vehicle Fitment & OE Reference Numbers

OE / Interchange Reference Numbers: CU716, CU1599, DPI716, DPI1599, CC716, MC716.

Before ordering: Compare the OE number, overall dimensions, inlet and outlet positions, mounting points, drain location, and engine-bay clearance with the original radiator.

Product Specifications & Package Includes

Package Includes: 1 × 3-row 56 mm aluminum radiator and 1 × radiator cap.

Signs Your Radiator Needs Replacement

• The engine runs hotter than normal or overheats during towing, hauling, idling, or warm-weather use.
• Coolant leaks appear around the radiator, seams, hose connections, drain area, or lower corners.
• The coolant level drops repeatedly without an obvious hose leak.
• The original radiator shows corrosion, damaged fins, internal blockage, or weakened seams.
• The temperature gauge fluctuates during city traffic, climbing, highway driving, or heavy-load use.
• The existing radiator no longer provides stable cooling for a restored or modified classic truck.

Replacing an aged radiator helps restore coolant circulation and heat transfer, reducing the risk of repeated overheating and related engine damage.

Key Features & Benefits

3-Row 56 mm Aluminum Core: Provides increased cooling surface area and coolant capacity for compatible classic Chevrolet and GMC applications.

Classic Truck and SUV Fitment: Designed around CU716-style mounting and connection locations for compatible C/K-Series, Suburban, Blazer, Jimmy, and G-Series applications.

Stable Cooling Under Load: Helps support engine temperature during commuting, towing, hauling, warm weather, traffic, and restoration use.

Radiator Cap Included: Supplied as part of the package for the specified radiator configuration.

Pressure & Leak Tested: Each radiator is tested before shipment to support dependable cooling-system performance.

Installation Notes & 4-Step Guide

Important: Classic vehicles may have modified engines, brackets, pulleys, hoses, fans, or engine-bay layouts. Compare the original setup carefully before installation. Professional installation is recommended.

1. Drain: Allow the engine to cool completely, remove the radiator cap carefully, and drain the old coolant into a suitable container.
2. Remove: Disconnect the radiator hoses, overflow hose, fan shroud or related components, and factory mounting hardware.
3. Install: Compare the dimensions and connection points, transfer reusable brackets or cushions when required, and install the new radiator using the compatible mounting locations.
4. Refill & Bleed: Reconnect all hoses, refill with the vehicle manufacturer-recommended coolant mixture, bleed trapped air, and inspect all connections for leaks.

After installation: Inspect the hoses, clamps, radiator cap, thermostat, cooling fan, water pump, and engine-bay clearance. Recheck coolant level and all mounting points after the first drive and again after the engine cools.