Broken Speedometer

I apologize for wasting band width if this has been discussed before but, a search of the Tahoe forum, came back with no hits. My speedometer suddently (no jerks, no sound, no nothing) went crazy while on an extended trip. I noticed it registering around 90 when I was not going over 70. As I continued to watch it, it gradually crept to up over 120!! My odometer is working fine and my cruise control is working well. What happened and how do I fix it?

I apologize for wasting band width if this has been discussed before but, a search of the Tahoe forum, came back with no hits. My speedometer suddently (no jerks, no sound, no nothing) went crazy while on an extended trip. I noticed it registering around 90 when I was not going over 70. As I continued to watch it, it gradually crept to up over 120!! My odometer is working fine and my cruise control is working well. What happened and how do I fix it?

what matters is what year is this vehicle 2005 ? if so you have bad dash step motors.

the speedometer signal comes from the tranny. if this were bad the abs light would be on and odo would not work .

Good morning,

I would be happy to check your vehicle's information for any recalls if you wanted to please send me a private message with the last 8 digits of your VIN and current mileage.

Kind regards,
Sarah
GM Customer Service

When you created your Thread ''Broken Speedometer'', Google ads & Similar Threads will be attached to yours @ the Bottom.. Google Keywords for Add words; Auto cluster repair.

You might be able to find a used cluster from the salvage yard, or Ebay.

Don't worry about the mileage, because the miles are stored on the ECU/PCU.

Focus on Similar Thread @ Bottom ''Broken Speedometer on 2004 Yukon Denali''
see www.automotiveforums.com/vbulletin/showthread.php?t=653181 (http://www.automotiveforums.com/vbulletin/showthread.php?t=653181)
For DIY, see www.instructables.com/id/How-to-Repair-a-GM-Speedometer/ (http://www.instructables.com/id/How-to-Repair-a-GM-Speedometer/)

*** See www.en.wikipedia.org/wiki/GM_Instrument_Cluster_Settlement (http://www.en.wikipedia.org/wiki/GM_Instrument_Cluster_Settlement)

I actually fixed a Honda Speedometer with a magnet and just bring the pointer to 0MPH!