AC / hot air

I am not sure we will be able to figure out what hose you are looking at with this info. We are going to need a little more detail but more then likely a picture would be the best way to get us on the same page.

Is there a reason you need to replace this hose? Is it leaking? Have you confirmed the pressures are low to ensure you don't have another issue with the A/C system?

Here is a guide that will help with doing this:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Below you will find a diagram of the two large lines that run from the compressor. Do one of them look like the line that you need?

Got it. Those are heater hoses. There are various options but most parts stores will pull up a part number for a molded line.

Here is a link to a parts site that has many options:

https://www.rockauto.com/en/catalog/chevrolet,2007,equinox,3.4l+v6,1434135,heat+&+air+conditioning,heater+hose+/+pipe,6892

Basically most all of them are cut to fit so they are in the general form but are long so that you can cut them off on your set up.

You can also just use bulk hose if you want to. There are normally not many serious bends that require a molded line.

Below is the process from the manual on how to replace them.

Please let us know if you need other info. Thanks