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Make sure to always use silicate-free DEX-COOL coolant as instructed in the owner's manual for Your 2014 GMC Sierra. This coolant is designed to last up to 5 years or 150,000 miles in Your vehicle. Using any other type of coolant may cause damage to the engine, heater core, or radiator. Additionally, the vehicle is equipped with a coolant heater, enhancing starting performance and fuel efficiency in cold weather. Regularly check the coolant reservoir and ensure levels are between the minimum and maximum markers. If levels are low, add more coolant until reaching the maximum mark.
The 2014 GMC Sierra is equipped with dex-cool antifreeze/coolant as recommended by General Motors.