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Flex-A-Lite Extruded Core Radiator and Dual Electric Fans 1973-1987 Full Size 1/2-ton GM Truck and SUV LS Engine

Quick Overview

Direct-fit Flex-A-Lite® Extruded Core performance aluminum radiator and dual electric fan system for 1973-1987 full-size 1/2-ton Chevrolet or GMC truck and SUV with LS engine swap.


Flex-A-Lite® Extruded Core Technology is the future of performance aluminum radiators, replacing multi-core radiators with a new advanced design. Flex-A-Lite® Extruded Core Radiators provide significantly better cooling with a stronger, more durable and lighter design.

This direct-fit radiator is engineered to bolt into a 1973-1987 full-size 1/2-ton Chevrolet or GMC truck or SUV with an LS engine swap. No cutting or drilling is required for installation, and the radiator will mount using the factory location and equipment. Includes a fully-shrouded dual-fan system that moves 4,600 cfm of airflow and a Variable Speed Controller. Radiator includes 22-24 lbs. cap and drain petcock.

Key features and benefits or the Flex-A-Lite® Extruded Core Radiator include:

  • The Extruded Tube Core increases contact area between coolant and the aluminum tubes for better heat rejection and cooling
  • The Extruded Tube Core provides a flat surface to braze the cooling fins to, maximizing the contact between the tubes and fins for increased heat rejection and better cooling
  • The cooling fins have been designed with louver patterns cut into them to direct airflow, improving heat rejection and cooling
  • Wind tunnel testing has shown that this Extruded Tube Core technology is significantly more efficient for cooling than standard tube radiators
  • The Flex-A-Lite® Extruded Tube Core Radiators are significantly stronger and have a 100-psi burst rating
  • Flex-A-Lite® Extruded Tube Core Radiators include a corner subhead, reinforcing the cooling tube to header connection; an area prone to cracking and leaking in other brands of aluminum radiators

Additional Information

SKU 315161
Height (inches) 20.75
Width (inches) 33.25
Depth (inches) 5.94
Inlet Side Passenger Side
Air Flow (cfm) 4,600
Fan Diameter (inches) Dual 13.5
Number of Blades 8
Amperage Draw 28
Fuse Rating (amp) 40
Year 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987
Model Sierra 1500
Engine No
Displacement CID No
Liters No
Fitment Notes No