Heater core hose replacement?

Good morning, PENDALESS UDENA REGAN,

You shouldn't have to move the engine or transmission at all for this job but depends when the lines come through the firewall and engine mounting. If just the hoses need to be replaced and are accessible through the firewall in the engine compartment, just replacing the hoses will be fine.

You will then need to refill with coolant and pressure test the system for any leaks. I will add a picture of this tool. It can be rented at your local auto parts store and is also available online. This will also help force coolant into the entire cooling system eliminating any air bubbles.

Next if no leaks are found, top off the coolant and leave the cap off the coolant reservoir and start the vehicle and let it warm up. you will start to get some bubbles as the coolant heats up and expands. When it does this make sure you top of the coolant and watch it carefully.

Most Chevrolet's have an expansion tank that is the highest point in the system. This will help bleed the system of any remaining air.

If you could send me a picture of what you are looking at exactly that will help a lot.

Please let me know if I can clarify anything more for you or help any further.

On thing to note: Chevrolet's take a special type of coolant called DEXCOOL. There was a Technical Service bulletin or a recall, I can't remember, where this coolant was replaced with regular green 50/50 mix.

If your coolant is pink, it is imperative you continue to use the DEXCOOL, if it is green then use the green 50/50 mix but never add green coolant to pink coolant or vice versa.

Here is an article that will aid in testing for leaks after the repair is complete:
https://www.2carpros.com/articles/radiator-pressure-test

Your vehicles coolant capacity is approximately 6.9 quarts. So, I would get 3 gallons of 50/50 premix and return what you don't use.

I hope this helps.

Thank you,
Brendon