5.3 l engine TrailBlazer overheating. Heater blows cold and doesn't blow at all on max. I hear water swishing in dash. And fogged windows, coolant inside passenger floor. heater core hoses are underneath and behind AC condenser, I fixed a cracked hose ( no leaks ) which already has a flush kit installed. I need a video or pictures, someone to walk me thru how to flush heater core?
What makes this problem better or worse?
Worse longer I drive it
How long has your 2006 Chevrolet Trailblazer EXT had this problem?
RepairPal Certified shops can diagnose and repair your 2006 Chevrolet Trailblazer EXT. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Hello, it sounds like you need to replace the heater core for verified leakage inside the passenger floor. Unclogging does not appear to be a concern.
Additionally, it sounds like you have an air pocket in your cooling system from doing repairs.
Lastly, your air not blowing on maximum speed is a blower motor or related circuit issue that should be tested.
Use this link to find some shops near you that can help with your concern:
www.repairpal.com/repair-shops
