How can I do a coolant flush?

Good morning.

The system holds about sixteen quarts complete.

If you are going to flush it, drain out all the old coolant. Remove the plugs for the block as well. Then I would remove the thermostat. Then add only water with your flushing agent. And run the truck for about half an hour. Then drain out all your water replace the thermostat with a new one and then add your new coolant. Run the engine at about 1,200 rpm's and watch the coolant level. Add as needed. You will know when the air is gone when you get full heat inside the truck.

Get the 50-50 mix gallons of coolant and add as needed. I would get four gallons of the 50-50 mix.

Roy

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

https://www.2carpros.com/articles/replace-thermostat

This video shows it on a similar car

https://youtu.be/j8_MD76LbiQ

Please let us know if you need anything else to get the problem fixed.

50-50 is recommended and will protect to -35.

If you use full strength, the temperature will not come up to thermostat temperature and the engine fuel mapping will be off and will set codes for not heating up.

Roy

50-50 is the proper mix. All you would be doing with your full strength is making two gallons from one gallon of 100%. It will be exactly the same as if you got two gallons of 50-50 coolant.

Roy

After you open the drains on the block on either side, it will drain all the block. Remember you have to open those plugs to drain either side of the block to remove everything.

Roy

There are small plugs about the middle of the block on each side. They are pipe plugs around 1/4 or 5/16. They are the drains for the block. I do not have a picture of them or I would post.

Roy

They are on the side of the block down low by the oil pan.

Found a picture.

If you are going to do it yourself, drain the radiator and remove the block drain plug(s). Also remove the thermostat. Run fresh water through the cooling system until it runs clear. Replace the block plugs and radiator drain plug and refill with coolant. Also make sure the heater is set to maximun heat (to clean the heater core).
This is a messy business, and coolant is toxic and hard to clean up.
You may want to look at the cost to flush the system at a local garage, in many cases you can get it done for under $150.

Open the petcoclk an dlet it drain or pull a hose an dlet it drain form that then start by puttign wter in system. You can find it on any of hte systems sold at auto parts stores.