Sign me up for the ever growing list for Air Conditioning Not Working - No Cold Air. I bought my 2010 Acadia 4(ish) years ago. We have not had many issues. I have LOVED my Acadia until this summer. My husband and I both love GMC vehicles. (He has a 2006 Sierra.) The first A/C issues started this past spring when I noticed a noise (the hissing sound) coming from the vents. It was not yet that warm and the A/C was cool enough for that time of year in St. Louis. Then summer hit and there was no cool or cold A/C. My snowflake button would blink three times and then turn off. I finally found the time to take it to the dealer. They said it was the A/C line in front that had to be replaced. That was around $600 to repair. We still had the noise but the A/C was COLD. A week or so later I noticed that once again there was no COLD air. For the second time I took my car to the dealer. This time it was the rear evaporator and the bill was over $700 (with a discount)! One week later and my car is back in the shop for A/C issues. I dropped it off on Tuesday evening. I finally called them this afternoon (Thursday) to check in and see what they had found. He said he had not called me yet because they were busy and he wants to discuss with others at the dealership. But he did tell me that it is now an issue in the front and the dash has to be removed. It will take over 10 hours to repair and possibly another $1,400! He said that since I am over the warranty because of mileage GM is not willing to help out. The dealership has given me loaner cars for each trip which has been very helpful since I drive 40+ miles to get to work 5 days a week. But really a car that is less than 5 years old should not have A/C problems. AND after reading this forum it is not like I am the only one with these issues. GM needs to stand up behind their cars or we will NOT be purchasing another GMC/Chevrolet/Cadillac/Buick vehicle again which is all we have ever purchased! I guess we will wait until tomorrow to see what the Shop Manager and the Service Supervisor decide and give me a final quote and will update the forum.