• Hint: Use a descriptive title for your new message
    If you're looking for help and want to draw people in who can assist you, use a descriptive subject title when posting your message. In other words, "2008 LaCrosse" isn't going to indicate to anybody that you need help. However, "Need help with my 2008 LaCrosse" will. Be as descriptive as you can. Please use common sense... This message can be closed by clicking the X in the top right corner.

2007 Lucerne with no heat


New member
Buick Ownership
2007 Lucerne
I have already replaced the radiator, heater core, all of the door actuators, thermostat (2x), and thermostat sensor. Each time I replace something, the heat works for 2 days and then blows cold. I am getting a code that says I need to change my thermostat. I am out of ideas, and cold. Any ideas on what the problem might be?


Full Member
Buick Ownership
2007 Lucerne CXL. and 1995 Lesabre currently, past 1973 Riviera, 1968 Riviera
Not knowing the code it may be something else, but you may want to consider the dash HVAC control module which could be the problem.
Pedal Commander