Worst 2003 Trailblazer AC / heater Problems
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- fan switch doesn't work on all settings
- A/C blows warm air
- ac/heat doesn't work when idling
- blower inoperative
- external temperature incorrect
- foul odor coming from air vent
- heater runs continuously on side and back
- repeated a/c motor failure
- ticking sound
- vents malfunctioning
- water leaking into vehicle interior
Compare Chevrolet Trailblazer Model Years
Curious how the 2003 Trailblazer compares to other years? Check out our new Chevrolet Trailblazer overview page to see the most problematic years, worst problems and most recently reported complaints with the Trailblazer.