erratic speedometer [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: erratic speedometer


shademan92
02-24-2005, 08:35 PM
Have any of you guys ever ran into erratic speedometer problems. I have been experiencing problems lately on my 92 d-250 4x4. You can be sitting in park and the speedometer will register all the way up to 90 mph plus. I replaced the speed sensor but the problem still exists, but only sometimes. any ideas?

thanks,:help:

cobra13
02-25-2005, 11:34 AM
check your alternator....and batteries.....the speedos are electric and any kind of voltage problem can cause this.


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