Duramax Coolant / Antifreeze Drain & Refill or Replace

Bi-weekly "How to" #23. Truck used - 04 GMC 2500 HD Filling your rad is much different than it used to be. This is how I did it. Maybe I didn't need to rev it up like that but it was fun! Thermostat Housing Duramax - https://amzn.to/3u7x113 Thermostat Housing Gasket - https://amzn.to/2Wfko7C ACDelco GM Engine Coolant Thermostat - https://amzn.to/3o5FUHe ACDelco GM Engine Coolant Thermostat - https://amzn.to/3CNsHHp Changing Thermostats - 04 GMC 2500 HD -    • Duramax - Changing Thermostats - 04 GMC 25...   Disclaimer: To the best of my knowledge this video is accurate. I am in no way responsible for any occurance resulting from following the instructions in this video.