Tachometer and Speedometer Not Working

Does the speedometer ever read incorrectly or does it just flat line?

When does the speedometer stop working? Doesn't work at all when you start the vehicle? After you've driven for a while? What about the tach?

Does it not work when the vehicle is cold or after you've done a few trips?

How old is your battery?

Steve

Thanks for you response Steve. No, the speedometer never reads incorrectly. When they are inoperatable - both the speedometer and tachometer do not work. I can say it's more commonly when I first start the vehicle that I am alerted of the needles but sometimes after some driving they will return to normal. The battery is less than 3 years old. But most importantly do you know why the truck would be so difficult to get up to speed? Is it the transmission or something worse? I just don't know how it can all be related. It's like when you're moving away from the "No Wake" area on a lake and the boat is slowly motoring along, then when you slowly give it throttle it will pick up. If that makes any sense. Hopefully you have some advice. Thanks again Steve.

R>>I know very little about vehicles. My question, is at times my tachometer >>and

Any warning lights on at any time?

Steve

Yes....the service engine light and the ABS light as well.

R>> Thanks for you response Steve. No, the speedometer never reads >> incorrectly.

Have the codes read, reset the light(s), test drive, have the codes read if the light(s) come back on, report back your findings.

Steve