Where is the fuse for heating and air conditioning 2005 Trailblazer?

In a 2005 Chevrolet Trailblazer, the fuse for the heating and air conditioning system is located in the underhood fuse box. Typically, it's labeled as "HVAC" or "A/C" in the fuse diagram. You can find the fuse box near the battery; consult the owner’s manual for specific fuse locations and ratings. Always ensure the vehicle is off before checking or replacing fuses.