1997 GMC Jimmy 6 cyl Four Wheel Drive Automatic 185000 miles
i have a 1997 jimmy when I start it the oil pressure is around 40-45 and drops to 30 or 35 when is warm, and goes back to 40 or just above when I am driving. After driving for a long time or after driving on the highway and stopping the oil pressure drops to around 20 at idle and I can feel a slight vibration. When I bought it a few years ago the oil pressure was always at 40 it has been doing this for a year or more now since I let it get low on oil 1 time last year. Is the oil pump going out or is this something I dont need to worry about.
Monday, November 8th, 2010 AT 7:28 PM