Just bought a 2011 Chevy yesterday, (first time buyer) and it has about 74,000 miles on it. My AC is making a hissing noise and blowing hot air.

Any advice on estimatable cost of repairs or solutions would be great.

 

It needs to be properly diagnosed before anyone on here (or anywhere else for that matter) could provide an accurate estimate.

First and foremost confirm if the A/C compressor is or is not engaging and whether or not the engine cooling fans run when the A/C is turned on. Then troubleshoot further as necessary.

 

My brother in law checked it out for me. He said it was just out of freon with a possible leak. We refilled the freon and put the UV dye in it to ensure that there is no further leakage. The air was only blowing hot.

thank you!

 

The uv dye won't prevent leakage, but will be able to detect a leak with a uv light source