We don't have a lot of Chevrolet Trailblazer EXT AC / heater problems on file — feel free to add yours here. The most common Trailblazer EXT AC / heater problems occur at 152,000 miles. Click on a year below.

Worst AC / Heater Problems
blower motor not working properly 2003 Chevrolet Trailblazer EXT
A/C not working properly 2003 Chevrolet Trailblazer EXT
A/C not working 2006 Chevrolet Trailblazer EXT