Oil pressure gauge does not work and check gauges light comes on. Intermittently

jrdugg, if the oil has been changed and its just the oil notification that needs to be reset use this site: http://carhowto.com/how-to-reset-oil-life-light-on-jeep-grand-cherokee/ That site has a really handy app too, great if the light comes on while youre on the road. Hope it helps!