Quote Originally Posted by speed24 View Post
Hello All, I have a 2006 Grand Prix and it now has no heat. I bled the coolant system and there are no leaks. I cant figure out what the problem is. Any suggestions would help. Thanks in advance.
Don't turn on the a/c and play with the temp control knob. Will the temperature change any at all when you adjust the temp. control? I don't mean enough to where you thank you can tell. I mean from cold to a little warm. Just trying to figure out if it's the temp control module itself or something else. GMs HVAC controls are exactly good.