2004 Yukon 165,000 Oil Pressure gauge and Temp gauge stopped working over the summer, now all a sudden i'm getting "low oil pressure" warning, added a qrt of oil now its full and getting the same warning, going to change my whole cluster to fix the Temp and Oil pressure cause it needs to be changed anyway (majority of the lights are out along with temp and oil gauges pegged) my question is would I still get the warning signal if the gauge is just reading incorrectly or how could I tell one way or the other????HELP