Speedometer issues My speedometer will work every now and then but most the time it will read all the way up to 120 mph or stay at the wrong speed its not the speedometer or the dashboard cluster that's been checked out its a 2007 Pontiac Torrent FWD 5 speed transmission and it runs great. What do you think it could be?

Cars produced in Germany are electronically speed limited to about 150 mph. This is embedded in the software. If there are no other problems with the engine, fuel or transmission it is possible the management system has been remapped and the speed limiter has been reset to 120 mph.

Sounds like the speedometer is faulty. If the speed sensor were the problem, the odometer would not work correctly, the transmission would not shift correctly, and the check engine light would be on.

Scan the vehicle for fault codes first. Sounds like you need to check the vehicle speed sensor signal into the speedometer. If that is ok then send the speedo head out for repair.

Caravans can have issues with the sodering on the guage cluster boards. If you can't solder you may need to replace that part.

Under the car the speedometer cable attaches to the transmission...usually on the drivers side. Check to make sure this is tight. If it still doesn't work you can detach it and run it connected to a drill and see it the speedometer is operating sporadically or smothly or at all, the cable may need to be replaced. It may also me that it has come loose where it attaches to the dash board.

my speedometer will work every now and then but most the time it will read all the way up to 120 mph or stay at the wrong speed its not the speedometer or the dashboard cluster that's been checked out its a 2007 Pontiac Torrent FWD 5 speed transmission and it runs great. What do you think it could be?

you have a bad speedometer, its common and not a huge deal to fix or even a serious issue your best bet is to have it fixed by a mechanic and youll be good to go, no big deal

It is probable that the cable for the speedometer is streached and your MPH reading is incorrect all or most of the time, get a friend to drive behind you at say 55 MPH so you will know the odometer reading ( may prevent speeding ticket )
All metal expands when heated and contracts as it cools. Your cable becomes slack when hot. Stay Safe!

There was a recent class action law suit settled with GM for this exact problem. You can google gm speedometer lawsuit and get lots of information. Unforutunately for most people I think the warranty was limited to 7 years and 70,000 miles. Which isn't a lot of miles for most people.

If you car isn't covered by the warranty there is a way to "reset" the speedometer.

You can turn the ignition slowly like you are going to start the engine. There is a very small "dead" space where you will see your guage lights go off.

What you want to do is cycle the ignition switch from off to that dead space. Each time you do it your stuck speedometer will move towards zero about 10 mph. So if its stuck on 40 you will have to cycle it at least 4 times.

At first you will probably actually hit the ignition and the engine will try to start.....just release it and try it again.

I know this because I have a 04 avalanche with 80,0000 miles and it has this problem about twice a month.

It may be that the speedo cable has come loose at 1 end and will need to be tightened back up. Sorry but not sure where ends are attached on your car.