What causes low oil pressure in a 1995 GMC Sierra K1500 4x4 pick up truck?
it could be low oil level, oil pump going bad, oil presure
sending unit going bad or the oil pressure guage going bad if you
don't hear the valves making it may be the pressure uit or the
guage if you hear a noise coming from the enine do ot run it any
longer it may cause more damage