coolant replacement

[kadrovik]

Hello, Tahoe 6.2 liters, I want to completely change the coolant. How to completely drain it, including the engine block? Where is the drain plug located?

 

[swathdiver]

Здравствуйте, Тахо 6,2 литра, хочу полностью поменять охлаждающую жидкость. Как его полностью слить, включая блок двигателя? Где находится сливная пробка?

Translated from Russian:

Hello, Tahoe 6.2 liters, I want to completely change the coolant. How to completely drain it, including the engine block? Where is the drain plug?

Do the K2s have a petcock or do they also have to pull the lower radiator hose?

 

[kadrovik]

Removing the lower radiator hose will completely drain the coolant?

 

[swathdiver]

Removing the lower radiator hose will completely drain the coolant?

I don't think so. I have the previous generation and this is the process:

 

[swathdiver]

@Doubeleive @LT1ZOB

You guys with K2s done the radiator yet?

 

[Doubeleive]

@Doubeleive @LT1ZOB

You guys with K2s done the radiator yet?

I had the dealer use there vacuum machine on my 18 but typically now it's done by removing the lower hose, doesn't get everything but does get a lot of it out.

 

[B-train]

You can also get it to operating temp, vent pressure to system. Remove upper hose and put a scrap section of hose to the t-stat and down into a container. Let truck idle and pour in new blended coolant into the upper hose while the t-stat modulates what come out of the block. Run 4 gallons through and you should have most changed over. Make sure to have both the front ans rear heat set to hot.

I've done this in the past on other vehicles and it seems to work well. Your other option is to have a shop use a flushing machine to exchange the coolant (which hooks up the same way, just with built in containers).

 

[kadrovik]

Thank you