This question seems to be attracting a lot of views, so I guess a lot of people are having the same problem.

Just to be clear, the problem with MY fans specifically seemed to be caused by my new temp sensor being faulty. This isn't likely to be your problem, but don't rule it out. There are some other great diagnostics suggested below for other possible reasons the fans aren't running.

There was a bigger problem with overheating with this car, even after the fans were running correctly. The stock engine comes with a plastic intake manifold gasket, which is prone to failure. It leaks coolant into the cylinders and causes inefficiency in the cooling system, leading to low coolant and overheating. You can replace this gasket with a metal one, the repair is a little involved but I managed with a Haynes manual. Good luck!

Original Question









| improve this answer | |


| improve this answer | |


| improve this answer | |
  • Hi, thanks for the answer. In this particular case, the problem was that my new part was a dud. Your suggestion is definitely plausible, and a good thing to check when diagnosing this problem. I no longer have this vehicle (the question is 2 years old), but I hope this can help someone else in the future. Take care! – Chris Nov 26 '14 at 15:29

The problem might be with the body control module (BCM). The PCM sends the signal to the BCM, which turns the fans on. Or you can buy a separate temperature fan relay system with a temp probe and bypass the system. It will work as normal cooling when needed only.

| improve this answer | |
  • The BCM in most vehicles only controls things like the interior lights, radio, and the like. The PCM will switch the fans on as needed through a relay. This is how GM vehicles do it, anyway. – Pᴀᴜʟsᴛᴇʀ2 Nov 22 '14 at 16:57
  • My problem wound up being caused by a new part that was a dud, but this is a great suggestion for diagnostics if someone else is having the same problem. The question is over 2 years old, and I no longer have this vehicle, but thanks for trying to help! Hope this helps a future home mechanic. – Chris Nov 26 '14 at 15:31


| improve this answer | |
  • Thanks for the answer -- however, this question is 2 years old, and I no longer have the car. Also, the problem was, as indicated in the accepted answer, simply a case of my new part being a dud. That said, I think this suggestion is helpful in the diagnostic process if someone else is having a similar problem, it is very possible that there's a bad electrical connection. Thanks again! – Chris Nov 26 '14 at 15:27
