Mishimoto R13244 Replacement Radiator for 2011-2016 Chevy/GMC HD 6.6L V8

Vehicle Fitment

• 2011-2016 Chevrolet Silverado 2500 HD (6.6L V8 Duramax LML, 2WD/4WD)
• 2011-2016 Chevrolet Silverado 3500 HD (6.6L V8 Duramax LML, 2WD/4WD)
• 2011-2016 GMC Sierra 2500 HD (6.6L V8 Duramax LML, 2WD/4WD)
• 2011-2016 GMC Sierra 3500 HD (6.6L V8 Duramax LML, 2WD/4WD)

Fitment Notes

• Designed for 6.6L Duramax LML diesel applications.
• Fits both Chevrolet and GMC HD applications listed above.
• Compatible with factory engine-bay equipment and mounting locations.
• GMT900 and K2XX chassis codes are referenced for the applicable model years.
• No 2026 fitment is supported for this part number.

Features

• Direct-fit replacement radiator for 2011-2016 GM HD trucks.
• Engineered specifically for the 6.6L Duramax LML diesel engine.
• OEM-style design maintains factory mounting and hose connections.
• PA66 plastic end tanks provide durable factory-style construction.
• Aluminum radiator core provides reliable heat transfer.
• Designed to restore cooling performance of an aged, clogged, or leaking radiator.
• Works with stock engine-bay equipment without additional modifications.
• Direct replacement design requires no cutting, bending, or fabrication.
• Single-row core configuration matches the specified factory replacement application.
• Suitable for both 2500 HD and 3500 HD Duramax applications.
• Backed by Mishimoto's lifetime limited warranty.

Specifications

• Brand: Mishimoto
• Part Number: R13244
• Product Type: OE-Style Replacement Radiator
• Engine: 6.6L V8 Duramax LML Diesel
• Applications: Chevrolet Silverado 2500 HD/3500 HD; GMC Sierra 2500 HD/3500 HD
• Model Years: 2011-2016
• Chassis Codes: GMT900, K2XX
• Rows: 1
• Core Thickness: 1.9 in.
• Core Length: 33.5 in.
• Core Height: 27.5 in.
• Overall Length: 43.7 in.
• Overall Height: 29 in.
• Overall Width: 6.2 in.
• Inlet Diameter: 1.9 in.
• Outlet Diameter: 2 in.
• Coolant/Fluid Capacity: 3 gal.
• Material: PA66 Plastic and Aluminum
• Position: Front

Included Components

• 1x Factory Replacement Radiator

Product Description

The Mishimoto R13244 Replacement Radiator is designed as a direct-fit cooling-system replacement for 2011-2016 Chevrolet Silverado and GMC Sierra HD trucks equipped with the 6.6L Duramax LML V8 diesel. It is engineered around the factory radiator dimensions and mounting configuration, making it suitable for replacing an aged, clogged, cracked, or leaking original radiator.

The radiator uses OEM-style PA66 plastic end tanks paired with an aluminum core to provide dependable heat transfer and stock-level cooling performance. Its factory-style construction allows it to work with the original engine-bay equipment without cutting, bending, or other modifications. The R13244 is a practical OE-style replacement for Duramax-powered 2500 HD and 3500 HD trucks and is backed by Mishimoto's lifetime limited warranty.