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SELECT Your GMC Sierra 2500 HD Body Type

SELECT Your GMC Sierra 2500 HD Engine

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5 SELECT Engine
  1. ID: 1
    ✓ In Stock

    2020 - 2025 GMC Sierra 2500 Hd Radiator

    Applies to 2020 and 2021 models.
    Requires the 6.6 Liter Diesel Engine.
    OEM # 84799449

    $846.95
  2. ID: 2
    ✓ In Stock

    2020 - 2025 GMC Sierra 2500 Hd Radiator

    Applies to 2020 and 2021 models.
    Requires the 6.6 Liter Diesel Engine.
    Must be the Auxiliary radiator.
    OEM # 84098260

    $163.95
  3. ID: 3
    ✓ In Stock

    Radiator Assembly for 2017 - 2019 GMC Sierra 2500 HD, 84224661, Replacement

    For 6.6 Liter Turbo models.
    OEM # 84224661

    $430.95
  4. ID: 4
    ✓ In Stock

    Radiator for Chevrolet Silverado/GMC Sierra 2500 HD/3500 HD, Suitable for 6.0L Engine Models from 2011-2019, Replacement

    ⚠️ IMPORTANT: This radiator fits 6.0L GASOLINE engine models ONLY (2011-2019). DOES NOT FIT 6.6L Duramax Diesel engines.
    This is a complete assembly.

    $458.95
  5. ID: 5
    ✓ In Stock

    Radiator Kit for Chevrolet Silverado 2500 HD 2006-2010/Silverado 3500 HD 2007-2010, Aluminum Core, 8 Cylinder, 6.6L Engine, 2-Row Core, with Air Conditioning Condenser Replacement

    This radiator kit features an Aluminum Core and a 2-Row Core design. It is suitable for 8 cylinder, 6.6L engines. The kit includes the Air Conditioning Condenser.
    OEM #s: 15914079, 20913751

    $340.95
  6. ID: 6
    ✓ In Stock

    Radiator Kit for Chevrolet Silverado 2500 HD Classic 2007 & Silverado 2500 HD 2006 with Aluminum Core, 2-Row Core, for 8 Cylinder, 6.6L Engine, Including A/C Condenser Replacement

    OEM #s: 15914079, 20913752

    $341.95
  7. ID: 7
    ✓ In Stock

    Aluminum Core Radiator for 1999-2006 Silverado, 8 Cylinder, 6.0L Engine, 1-Row Core, with Engine Oil Cooler, Includes 2007 Classic, Replacement

    This fits models equipped with the 6.0 Liter or 6.2 Liter Engine.
    It includes the Engine Oil Cooler.
    OEM #: 22840116

    $195.95

Overview

The radiator in the GMC Sierra 2500 HD is a crucial component of the vehicle's cooling system. It regulates the engine temperature by dissipating heat from the coolant, ensuring optimal performance and preventing overheating. A well-functioning radiator is essential for the heavy-duty demands placed on this pickup truck, especially during towing or hauling.

Common Symptoms of Radiator Problems

Owners of the GMC Sierra 2500 HD might experience several signs indicating radiator issues:

Engine Overheating: If the temperature gauge rises above normal levels, it could signal a failing radiator not effectively cooling the engine.
Coolant Leaks: Puddles of coolant under the vehicle or a consistently low coolant level may indicate leaks from the radiator or its hoses.
Discolored Coolant: Rusty or contaminated coolant can suggest internal corrosion within the radiator, affecting its efficiency.
Clogged Fins: Debris blocking the radiator fins reduces airflow and heat dissipation, leading to higher engine temperatures.

Maintenance and Installation Tips

Proper care of the radiator ensures longevity and optimal performance:

Regular Coolant Flushes: It's recommended to flush and replace the coolant according to the manufacturer's schedule to prevent corrosion and buildup.
Inspect for Leaks: Periodically check for signs of coolant leaks around the radiator and hoses.
Clean the Radiator Fins: Remove debris from the radiator fins to maintain proper airflow. Use a soft brush or compressed air to avoid damaging the fins.
Professional Installation: When replacing the radiator, consider professional installation to ensure all components are correctly fitted and functioning.

Frequently Asked Questions

Q: How often should I replace the radiator in my GMC Sierra 2500 HD?

    A: Radiators can last many years, but factors like driving conditions and maintenance affect their lifespan. Regular inspections help determine when a replacement is necessary.

Q: Can I drive my truck if the radiator is leaking?

    A: Driving with a leaking radiator is not advisable. It can lead to engine overheating and severe damage. Address leaks promptly to avoid costly repairs.

Q: What type of coolant is best for the GMC Sierra 2500 HD?

    A: Use the coolant type recommended in the owner's manual. Typically, this is a Dex-Cool antifreeze solution suitable for GM vehicles.

Q: Why is my engine overheating even after replacing the radiator?

    A: If overheating persists, there may be other issues such as a faulty thermostat, water pump, or clogged coolant passages. A thorough inspection is recommended.

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