SPEEDOMETER ACTING FUNNY

January 4, 2006

This was weird. I was on the hwy with the cruise on. I was complaining that everyone was going below speed limit 'cause I was set at 65 and passing everyone. I slowed to 61 to go around a car and when I sped up the speedo stayed at 61. I checked the tach and and found it at 2000! Oops, I'm definitely speeding. Speeding up it was a little jerky like it was sticking?

Funny thing though, if I slowed down the speedo would drop. If I sped up it stopped at 61. It looked like it was always about 15-20 mph off. When I came to a complete stop the speedo was well below 0 mph.

Everything went back to normal when I shut the truck off and restarted it. Since then it looks like it is still jerky when speeding up but doesn't stop at 61 (or anwhere else).

????????? Thoughts?

biochemist · January 4, 2006

Read my recent post (couple issues)...mine did the same thing this past weekend. Took to dealer this morning...stuck on ~60 MPH or so...(after resetting once as yours). I too noticed it acted more like the second hand of a clock rather than a smooth action. They are ordering a new one (entire cluster not just the speedo)...said lots of 03-04 trucks having issues with them, they have replaced many. If you notice, it may reset or simply move to a new and different starting point on each key cycle...No big deal to replace under warranty, 400 bucks if not though...hope this helps, later,

biochemist · January 4, 2006

the dealer may request your truck be on the lot while they order a new one, mine does not care as it should be here in a day or so...I will have to ring them to see if the hours and such are going to be reprogrammed as well...will let you know, later,

Jasonsupafly · January 4, 2006

My tachometer does crazy stuff when and if it decides to work...Was told they would have to replace the entire cluster for $400 to $450...Its a 01 Z71 5.3....Spent 2 grand on an extended warranty and just my luck it isnt covered...Guess Ill be checking ebay or the old salvage yard cause i aint giving that kind of money for it to do it again in another 50000 miles..

burgundyz71 · January 5, 2006

My buddies 2500HD was acting goofy and would set on 50-60 when not running, so he noticed every time he started the truck it would come a few clicks closer to normal so he just kept starting and shutting off about 15 times in a row and it's been perfect since.

jpcustoms has some nice ones if you need to replace and are out of warranty.