My blend door broke, and I got GM to pay half. Here's my research and my story. Like many others, my 2006 Chevy Equinox temperature blend door malfunctioned. I first noticed this at the end of the summer in 2011 though it's possible that the problem began months earlier. As it got cooler outside, the lack of a functioning heat system became more noticeable inside. By October, my wife and I were certain that the vehicle really wasn't producing any heat and that we had to get it fixed.
Being a huge nerd, I immediately went online to try and gather information about the problem. Searching "2006 Chevy Equinox No Heat" on Google returned 34,100 hits. The first page was filled with forum threads that matched the problem we were experiencing, and after about 30 minutes I was convinced that our temperature blend door had failed. I was also convinced that it would cost way too much to fix and that General Motors was completely ignoring most owners that had the same problem. However, out of every 50 or so posts, I saw that one person had some luck in getting GM to contribute towards the payment.
With that tiny spark of hope, I set out to make the best case possible for GM to help pay for my Equinox to be repaired. I collected data, did self diagnostics, tried to get the service station on my side, and general did my best to make paying me off their best option. Perhaps I had an influence on them because in the end GM did cover half the expenses of fixing my Equinox.
Again, being a huge nerd, I decided to document my experience and share the resources I found with others. To that end, this blog. Enjoy, and good luck!