speedometer on 2004 Chevrolet Trailblazer

The speedometer works fine for a while and then it slowly goes down to zero. What is strange is the cruise control works fine all the time. When I'm stopped at a stop sign, I hear a clicking.

by in Roswell, NM on April 21, 2010
2 answers
ANSWER by on June 03, 2010
I had this problem as well the first thing that I did was to replace the speed sensor. This did not fix the problem the next thing that I did was to replace the instument cluster and this seems to have fixed the problem. The reason that I mentioned the speed sensor is that replacing this component is much cheaper than replacing the insrument cluster. Speed sensor $28.00 Instrument cluster $320.00. I hope this helps you with your problem.
1 person likes thisFlag inappropiateReply
ANSWER by on October 28, 2010
This is very common on the 03-06 Trailblazers. The cause is the motors behind the gauges are failing, they all go out eventually. You can get it repaired here - www.drspeedometer.com and there's a DIY guide here - www.howtorepairmyinstrumentcluster.com
Related Items:
my speedometer has been acting up. sometimes it works fine, other times it says I am doing 110 mph, but really only going 70?
i was told the part i needed was called a throttle position sensor. cant find that part. please help.
I have a problem with my speedometer reading increasing while driving. It might become inaccurate by as much as 20MPH and while rem...
My speedometer stop working and plug a little computer and now I have a code c0055 vehicle speed sensor circ...
In the morning when the passenger tail light doesn't work at the same time the radio speakers don't work I have to turn the radio max to were I can hardly hear. Sometimes by the afternoon the radio...