how do you fix instrument cluster that spazz out on 92 gmc pu?

[WadeS]

this is the second gmc truck I've owned that's done this. the tach bounces around a little,the speedo moves while in park, the oil and water gages act erratic and the gas Gage seems to be off also. how can i fix this or what should i check for???????????????

 

[Glitch]

sounds like a severe electrical problem.... it seems unlikely that the instrument cluste could be failing al at once but if so you should be able to unscrew it from te dashboard, take the plugs out of the back of it and plug in a new one. not hard at al unless you are dealing with 96 on up.