I have a 1995 Pontiac Bonneville that is displaying symptoms of a loose ground in the passenger compartment. I am having trouble locating a diagram that shows me where the grounding points are. Do any exist? How can I obtain them?

A 1993 Pontiac Bonneville ssei, how much do you know about it? How much horse power does it have? How fast can it go? What kind of cars could it beat in a race? What are your general thoughts on the car?

I have a 97 pontiac bonneville. when i start the engine up the oil pressure’s fine util it gets warmed up then the needle drops. It doesnt go all the way into the red it just fluctuates right over it at idle. Would replacing the pcv valve and putting a thicker grade oil do anygood? Or could it be the oil pressure switch malfunctioning?
And yes i checked the oil level its completley FULL!