Speedometer acting funny

N900WM · February 23, 2007

Been plowing snow here in upstate NY the past couple days.

Looked down the other morning and the speedometer showed 120mph.

The thing is I was sitting still.

The next day it read 80. And the day after that it seemed normal but would rev up like the tach when you rev the engne in neutral.

Yesterday, I checked it with a GPS and it seems to be working. However, now it makes a clicking noise.

What did I do?

bobcat5544 · February 23, 2007

This will require the cluster to be replaced or sent to a repair shop to be fixed. I know what the exact problem is, but I am having a brain fart right now and can't find my info on it to be able to tell you where to get the part to do the repair your self if you choose.

I will look for the the info for you. If I can't find it I will atlease give you a few places that do exchanges

bobcat5544 · February 23, 2007

The part that is bad inside the instrument cluster is called the Stepper Motor

superman072000 · February 24, 2007

You can find Stepper motors on Ebay for anywhere from 9.99-14.99+shipping. There is also a guy in conneticut that will repair and or upgrade your cluster from anywhere from 109.00-249.99. Depending on what you want done to it. But you can replace them fairly easy google that sh*t and save some money.

N900WM · February 25, 2007

Roger that.

Thanks guys.

z71 1980 · March 9, 2007

Hi im a newbie at this so bare with me. I had this problem on my 04 z71 while under waranty GM dealership said they this problem offten. they had to replace guage cluster.

bmodert · May 11, 2007

I had the same problem, speedo would register crazy high speeds, sitting still it would register rpms for the speed. Also Temp gauge immediately after start up was like 220. Everyone was saying instrument cluster/gauge....but I took out alternator to check because that was a bit cheaper at the time, sure enough it was bad. Changed it out, and all gauges went back to normal.....so it could be either or....

The only thing was the clicking noise,,,it was not really there, only if you listened real close you could hear it a little.

I heard both reasons, and just decided to go the cheapest/easiest route for me first.

the blur · May 16, 2007

they replaced my cluster.

although, now the engine hours restarted from ZERO.

craiglistpwng · July 7, 2007

I had the same problem, speedo would register crazy high speeds, sitting still it would register rpms for the speed. Also Temp gauge immediately after start up was like 220. Everyone was saying instrument cluster/gauge....but I took out alternator to check because that was a bit cheaper at the time, sure enough it was bad. Changed it out, and all gauges went back to normal.....so it could be either or....
The only thing was the clicking noise,,,it was not really there, only if you listened real close you could hear it a little.

I heard both reasons, and just decided to go the cheapest/easiest route for me first.

I have maybe a similar problem. In park engine of the speedometer has read 40 mph. Also seems like my Oil pressure gauge, voltmeter, temp gauge, and fuel gauge needles all stay at about the same angle. My tach is very jumpy. I replaced my altenator a couple months ago, and all this has started in the past month. Although I not sure what you are talking about a clicking noise? Is it possible I have a bad alternator?

GMTRUCKTECH · July 8, 2007

03 AND UP SILVERADOS HAVE ALOT OF PROBLEMS WITH THERE MOTORS INSIDE THE CLUSTER. HERES A NUMBER TO A GUY THAT YOU CAN SHIP YOU CLUSTER TO AND HE WILL REPAIR IT AND SHIP IT BACK. CHARELS 954 818 8188 TELL HIM ROGER FROM PHIL SMITH CHEV SENT YOU. THE CLUSTER IS SOOOO EASY TO REMOVE JUST TAKE OFF THE BEZEL IT JUST SNAPS OFF AND THEN THE FOUR SCREWS HOLDING THE CLUSTER IN.