Speedometer Is Broken

[Yukon1999FLA]

Last week I was driving down the road and all of the sudden my speedo read 70mph!! I was only doing 30mph tops. I got to work and turned the truck off. After restarting it, it reset itself. It has happened a couple times. Tonight it was pegged past 120mph. When I got home I tried restarting it but the speedo would only reset in 10 mph increments. After 10-12 times it's back to zero.

What could be the cause? All the other guages are working fine....for now!

[Stevens03]

The speedo stepper motor is bad. You can buy parts to replace the motor off ebay or replace the cluster.

[Chris]

there is a TSB out for this. GM extended the warranty on the clusters to 7 years 70,000 miles. see the dealer. i got mine replaced for that reason

[smrio]

Are those Stepper motors easy to remove? I have some soldering experience. My dash is already taken apart for another reason.

[nickvrebel]

yes, fairly easy. look for an auction on ebay for them. usually the seller will be able to provide you with some guidance

[svaneld]

Just had this taken care of in my 2005 Sierra. Same exact thing was going on. It is those motors. On the tsb you are covered up to the 70k miles completly. If you have between 70k and 80k the part is covered but you have to pay for labor. I had 75k miles so I got the part but had to pay labor. Labor was for the instal was only like $30. If it is covered it is a lot easier to go this rout instead of replacing the motor yourself.

[youcantkeepup!]

now i could be 100% wrong but when your speedo sticks/pegs at a hugher number im pretty sure its pilein' on the mileage on the odometer according to what your speedo says, so if yours was pegged at 100 MPH for 30 min, you put 50 miles on the odometer even if you only drive 7 miles. Or i could be wrong...lol

[ACESFULL]

NO no more mileage tacked on to it. Its best to replace the whole cluster. Gonna cost you about 250-300 but ive seen mutiple guages go out, such as tach and temp guage and so forth. Youll need to pull the old cluster out and take the part number off of it and have your local chevy parts order and new cluster( tell them to make sure ISS programs the mileage and hours). Once it comes in give them your old one and install the new one, some have to be programmed and some dont, if your does the servoce dept can do it for you. Just my 2 cents

[[email protected]]

Seems to me it's time to put a 0-60 vid on youtube.

[Chris]

Just had this taken care of in my 2005 Sierra. Same exact thing was going on. It is those motors. On the tsb you are covered up to the 70k miles completly. If you have between 70k and 80k the part is covered but you have to pay for labor. I had 75k miles so I got the part but had to pay labor. Labor was for the instal was only like $30. If it is covered it is a lot easier to go this rout instead of replacing the motor yourself.

 

really? i had 79,000 and they still did it free

[michigansilver03]

I have a 2003 and on my 3 rd, now I just open the cluster up and push the needle back down and I'm good to go.

[chakis24]

would this also cause a speedometer needle to decrease in speed but not increase in speed? for example, last winter/spring i would be cruising at say 70, slow down to 60, and then back up to 70- but the speedo wouldnt go past 60. and if i decreased in speed again, speedo would decrease the correct amount, but wouldnt increase. this would happen until the needle couldnt decrease any further (below 0). also, sometimes the needle "sticks". instead of a smooth increase it will jump in like 3 mph increments.

 

it has since pretty much corrected itself. just curious.

[michigansilver03]

Usually they just stick and not drop down. So if it sticks at 60 and you drive at 50 it will read 110

[Chris]

well i was pulled over on base and he asked if i knew the limit i told him 25. he asked if i knew my speed and the truck was off. i laughed and said 120. the needle was still sitting at 120.

[GPGuy]

Seems to me it's time to put a 0-60 vid on youtube.

Very true!