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Q: my speedometor stopped working after last maintanence work. on 2003 Chevrolet Trailblazer

my a/c only works on 4 now and the miles show up in odometor but not sppedometor. ck engine light, airbag light and change oil light always on.
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possible failure in the cluster. loose contact or failing component. may need to be reprogrammed. get it looked at in the shop.
These 03-06 Trailblazer's are bad about this kind of problem, it's usually caused by failing stepper motors inside the instrument cluster.

Each gauge has a motor that controls it's needle movement and when the motor goes out the gauge will either stick, jump around or die all together.

Another common problem is when all the gauges just stop working all at once (but the back lights inside the instrument cluster still work). This problem is also a problem with the instrument cluster that requires it to be taken out, opened up and repaired.

If you'd like to learn more about the problem and how to get it fixed please visit our site at
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