Three problems related to horn assembly have been reported for the 2003 Chevrolet Trailblazer. The most recently reported issues are listed below.
I purchased my 2003 chev Trailblazer new in 2003. I have never had any problems with it. It was parked in my driveway and I just went outside and unlocked it to put something in the vehicle and locked it back. About an hour or so later, I heard the horn start to blow but the keys were hanging up inside the house. I went out to see what the problem was and the vehicle started trying to crank on its on several times. Then I smelled something and raised the hood and the fuse box located under the hood was melting. We disconnected the battery but it had already melted the box by that time. I had it towed to the dealership but they didn't know if there was a recall or not. I need for someone to tell me why a vehicle would do something like that when I was not even driving it at the time and if hopefully there is some kind of recall because I can't afford what they are telling me it will take to fix it. They said it destroyed all three wiring harnesses. ??.
The contact owns a 2003 Chevrolet Trailblazer. The contact complained about a speedometer failure. While idling the speedometer read 90 mph. The dealer stated that the instrument cluster was damaged. When the temperature was below 30 degrees the steering column froze and activated the horn. The horn will not deactivate unless the fuse wasremoved. Additionally, when applying the brake pedal the vehicle began to decelerate, but the pedal dropped all the way down to the floor. The contact must release and depress the brake pedal again in order to stop the vehicle. The dealer was unable to diagnose the cause of the failures. The current mileage is 75,000, and failure mileage was 70,000.
While drivning the horn and door light would come on intermittently.