Sitting in park the speedometer needle will go from zero to 35 automatically with out driving?

The speedometer on my car has stopped working and the fuse is suppose to be good how can I go about fixing this myself and what might the problem be? Any help would be great thanks
cclare2001

My speedometer on my '03 Cavalier is constantly wrong. I can have my car at a complete stop and the speedometer will read like 50 mph. Just today I was driving and it wasn't even on the speedometer, it was pointing directly down when I was going around 65 mph and then stayed there when I turned my car off. This has been happening several times a week and the only thing I can do to try to correct it is to start turning over my engine. What is the problem?

I have the car listed above and I took it to get an oil change. When it was done my car was smoking coolant was leaking out of my car, speedometer isn’t working and it won’t shift out of first gear. It wasn’t like that before I took it in or any days prior. I pay attention to my car so I know when something is wrong. Can anything I named gone wrong with someone doing an oil change on my car? I feel like it’s the places fault rather than my car just being old like they are trying to tell me. Again noting was wrong with it before I took it in. The assistant manger from the place drove to my house and told me it was my heater core. I looked up info in that but I never had any of those warnings to inform me and even transmission doing anything crazy. I’m really confused and frustrated. Please have some type of answer that could make sense to me.

KASEKENNY1
It’s started like 5-10 minutes after the car was taken from the place. They said the just topped off my fluids ie, coolant and transmission. So it wasn’t days it happened just mins after. I’ve always taken it there and I’ve never had any issue with my car after it left from getting an oil change. I just think is super strange.

The speedometer quits after 35 mph. The odometer is still working while the speedometer drops to 0. We replaced the vss and it does the same thing. Cant figure out what else could be wrong. Any one have some suggestions.

The cluster is one piece and I was told I have to get a new cluster, found one on ebay for 59.00 for a company that repairs them. Thanks for your help

1991 Chevy Cavalier. The speedometer stopped working. Nothing is digital. Everything is completely basic. Nothing powered. I looked for a cable behind the dash and found nothing. Not even anything close to a cable. Looked AGAIN for anything that looked like a sensor or (anything) NOPE. Looked around the engine for a sensor or cable. I'm pretty lost now. O.K. I bought the book on the car and it sort of helped. It told me to replace the cable. Went to buy one. The mechanic there said it should be a sensor. Possibly just corroded. LOOKED and LOOKED. Just can't seem to find it. Found something. (This will be interesting to explain) here it goes. I found a wire it connects to a big round cylinder. Located closest to the windshield (under the hood) on the left hand side. (It's located way up in the hood, I mean right next to the windshield, not even close to the transmission right behind and to the left of the air filter) Now, the cylinder has two wires going into it. One is black colored, that one looks really clean and inserts into the cylinder. 2 pink colored, simply has a clip, and slips onto a L bracket (pretty small). Went ahead and unscrewed the pink one. Cleaned completely. No more corrosion. Reconnected. Wow! The speedometer wants to work. Where can I find were the pink wire goes. It should go to the transmission. But where? Can I get to it without dropping anything off? Like the cover of the transmission? I really need help. (Can you tell)? I know you two get a lot of goofy questions. This will be one of the best. Using cylinder as a description. Please help me out after you get done laughing. Thanks guys!

We are not laughing we know how frustrating it can be to solve car problems. We are not sure what the big round cylinder is or what the pink wire is about without having the car in front of us. However we feel your problem is with the vehicle speed sensor. It should be located on the transmission tucked underneath the motor very close to the passenger side axle. If the wires have come off or are corroded, this could be your problem. If the wires and connectors look okay, then most likely, the sensor is bad.