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2004 chevy trailblazer_lt
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Well, it could be one of two other things. One, it could be that the ignition switch is bad. Two, it could be that the instrument cluster is going bad.

On this series of vehicles, the ignition switch is known to go bad. The question is not if it will go bad, but when will it go bad. Many of us carry a spare ignition switch for when the time comes. Here is a nice write up on how to replace the ignition switch:


Diagnosis of a bad ignition switch is by exclusion - ruling everything else out, or by the weirdness factor - why is it my dash lights only work on the third Thursday after a full moon and my radio thinks it has become a scanner whenever I hicup.

One other cause - a light bulb on the instrument cluster is brighter than it should be and it is kind of like "bleed over", but this only happens when the instrument panel is illuminated.

Here is some interesting reading:

 

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Premium Member
2004 chevy trailblazer_lt
Joined
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3,000 Posts
I'll keep my toes crossed for you!
 
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