psualumni Posted April 30, 2017 Report Share Posted April 30, 2017 I was driving on my way in for an overtime graveyard shift tonight and I noticed that my tachometer was misbehaving. It would read an increase in RPM as normal, but would not fall when engine RPM fell. Needless to say now my Tach is pinned passed 6K. Has anyone seen this before? Is it as simple as disassembling the dash and manually pushing the needle back down to 0? If I reset it manually I am afraid it will just pin out again. Anyone know what would cause this and how to fix it permanently? Sent from my STV100-1 using Tapatalk Quote Link to comment Share on other sites More sharing options...
8hnpSS Posted April 30, 2017 Report Share Posted April 30, 2017 unless your foot is slipping onto the gas peddle your stepper motor is stuck. its one of those things guaranteed to go wrong with the truck at some point. there are services who rebuild gauge clusters. ive used http://www.gmgaugeguy.com/ before on my old H2 worked perfect after. its the actual stepper motor thats the issue. you would be just wasting your time pushing it back into place its going to bounce out of alignment again. if you are good with a soldering iron its an easy job to do on your own. Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted April 30, 2017 Report Share Posted April 30, 2017 Stepper motor would be my first guess too. When my speedo step motor went the speedo would read erratically, higher or lower than actual speed. It never stuck at one setting though. Quote Link to comment Share on other sites More sharing options...
psualumni Posted April 30, 2017 Author Report Share Posted April 30, 2017 Thanks guys. I'll replace the stepper motor and I'm pretty sure that should clear the problem. I've read of these instrument panels going bad as a common problem. Sort of a shame, my truck only has 30k on it! Sent from my STV100-1 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Downeast Johnny Posted May 1, 2017 Report Share Posted May 1, 2017 Thanks guys. I'll replace the stepper motor and I'm pretty sure that should clear the problem. I've read of these instrument panels going bad as a common problem. Sort of a shame, my truck only has 30k on it! Sent from my STV100-1 using Tapatalk In that case, it failed from lack of use. Quote Link to comment Share on other sites More sharing options...
Muggs Posted May 21, 2017 Report Share Posted May 21, 2017 Stepper motor, it's a known failure in the clusters. Quote Link to comment Share on other sites More sharing options...
1981evildisco Posted June 5, 2017 Report Share Posted June 5, 2017 I was driving on my way in for an overtime graveyard shift tonight and I noticed that my tachometer was misbehaving. It would read an increase in RPM as normal, but would not fall when engine RPM fell. Needless to say now my Tach is pinned passed 6K. Has anyone seen this before? Is it as simple as disassembling the dash and manually pushing the needle back down to 0? If I reset it manually I am afraid it will just pin out again. Anyone know what would cause this and how to fix it permanently? Sent from my STV100-1 using Tapatalk send it off to GMGaugeGuy Quote Link to comment Share on other sites More sharing options...
EXGM Posted June 5, 2017 Report Share Posted June 5, 2017 (edited) that will fix it! Edited June 5, 2017 by EXGM (see edit history) Quote Link to comment Share on other sites More sharing options...
psualumni Posted September 6, 2017 Author Report Share Posted September 6, 2017 Sent it off to GM Gauge Guy, now it works better than new! Quote Link to comment Share on other sites More sharing options...
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