Noticed the oil gauge was not working this morning, and the motor sounded like a diesel. Checked the oil level and it was fine. By the time I got home, truck stalled, and would turn over but not start. There was also a fine spray of oil close to the power steering pump, but it didnt look like regular oil, it looked red. Anyway does it sound like the oil pump is for sure out, and how hard is it to change it? I don't want to rebuild the engine, just get it running good enough to make it a couple of months and trade it in.