* Generally, on both engines, the oil filter is located on the driver's side (left side) of the engine, towards the front. It's usually fairly accessible, but you might need to maneuver around some components to get to it.
* To be certain, I strongly recommend you consult a repair manual specific to your 1989 Chevy S10's engine. A Chilton's or Haynes manual will show you exactly where it is with a diagram and pictures. You can also search online for "1989 Chevy S10 [your engine size] oil filter location" and find pictures or videos.
Looking at a picture of your engine bay online will also help immensely. Using the engine size will help refine your search.
