How do you change the coolant in 2008 GMC Sierra?

Answer 1

To change the coolant in a 2008 GMC Sierra, start by ensuring the engine is cool and then locate the radiator drain plug at the bottom of the radiator. Place a container underneath to catch the old coolant, open the drain plug, and allow the coolant to fully drain out. After draining, close the drain plug, refill the radiator with a 50/50 mixture of coolant and distilled water, and run the engine with the heater on high until it reaches operating temperature to help purge air from the system. Finally, check for leaks and ensure the coolant level is correct before sealing the radiator.