I have a 1999 Buick LeSabre with an occasional instrument cluster panel problem. At random times at random speeds the speedometer and/or the tachometer will just suddenly quit working and drop to zero.
Here is the strange fix: If I press real hard or pull real hard on the trip reset knob (located between the odometer and tachometer) the speedometer and tachometer will start working again for another minute or even days at at time.
Any ideas on what is wrong? and how to permanently fix the speedometer and tach? Thanks.