I have had problems in the past with my 2003 quad cab. First I though I had problems with the stereo and clock shutting off and turning on at random. I replaced the head unit with an Alpine unit with a direct battery connection and that's been fine. Now I'll get a quick flash on the security system light o the dash, even though I don't have that feature on my truck, and the door locks won't function on either the door switches or key fob! Start the truck and the door locks function as normal. Is this the MIC cluster reflash problem? When this happens I can't lock or unlock the truck without the key.