I've a recently acquired 1991 C1500 V6, 4.3L w/5-spd manual. It's got that dash cluster I'm not particularly fond of, but the gauges are wheel edge type with white fill indicating level for fuel, oil pressure, speedometer, etc. Anyway, the Oil Pressure is the only one of concern. I do know the speedometer always going berserk is due to the VSS, which I will soon fix. When I start the engine and as it idles after warming up, it shows a pretty steady 30psi. As soon as I accelerated, no load and normal, it pegs the oil pressure off the end. Is this gauge driven directly by oil pressure or electronic signal? High oil pressure is something I've never had to deal with. IIRC, this could indicate clogged passages and such. The engine runs great, holds temp and doesn't seem to have any problems. How can I tell if the gauge is bad? I guess I should put a test gauge on it and see what the oil pressure really is, huh? Any helpful tips appreciated.