Question about 2005 Chevrolet Trailblazer Ext

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Speedometer not working

My speedometer is not working and is stuck at about 30 miles per hour. what could that be?

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  • lordkeyz27
    lordkeyz27 Nov 20, 2008

    you guys are great!

  • Anonymous Jan 07, 2009

    HOW CAN I GET ONE FOR$105

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Hello, this problem is due to a failing stepper motor. The stepper motor is the motor behind the gauge that controls the movement of the needle. When a stepper motor begins to go out it will cause the gauge needle to stick, skip around, stay at zero or max out on the gauge. The only way to fix the problem is to replace the stepper motor with a new one. While replacing one motor it is best to go ahead and replace them all as the others will go out in time as well. Your cluster will have one motor for each gauge. Here's a link to a page showing exactly how to replace a GM stepper motor and where to get the correct parts to do the job! DIY Finally How To Repair GM Instrument Cluster At Home Speedometer And...

Posted on Dec 16, 2014

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Ive repaired a lot of clusters with this problem. You have a bad stepper motor. cost is 105.00

alheg1@msn.com

Posted on Nov 28, 2008

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It very well could be the instrument cluster, i believe ive heard of this before. shifting is ok? may want to call dealer with vin# and see if there is a service bulletin on this problem. i may do a search as well

Posted on Nov 20, 2008

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SOURCE: Speedometer stuck at 20 miles an hour?

My 96 did the same thing. The speed sensor is and was fine -- the problem is an open circuit in the wires inside the gauge itself.

The Chilton's manual has pretty good instructions on how to replace the instrument cluster. You can buy just the speedometer gauge, or an entire instrument cluster for $100 or so on eBay. Just be sure you get a cluster that matches your model and trim line -- the LX and DX have different clusters, and of course the automatic and the 5-speed are different as well.


Do be sure to disconnect the battery before you begin the project, as there's a (slim) chance you can discharge the airbags if you don't

Posted on Oct 04, 2009

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SOURCE: Speedometer is 5 miles per hour slow at 55 miles

drive 5mph faster than the speed limit or replace the speedometer.

Posted on Sep 03, 2010

  • 8 Answers

SOURCE: Speedometer is on 70 miles

How did you find out about the speed difference? Have you changed the wheel and/or tire size with something aftermarket?

Posted on Mar 02, 2011

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