Where is the oil pressure switch on a 1989 suburban with 350 V8?

The oil pressure switch on a 1989 Chevy Suburban with a 350 V8 is typically located on the driver's side of the engine block, near the oil filter. However, the exact location can vary slightly depending on the specific engine configuration and accessories.

To be certain, you should:

1. Consult a repair manual: A Haynes or Chilton manual specific to your year and model Suburban will have a detailed diagram showing the exact location of the oil pressure switch. This is the most reliable method.

2. Look near the oil filter: Start your search in this area. The switch is often mounted directly to the engine block near the oil filter housing. It's usually a small, cylindrical switch with one or two wires connected to it.

3. Trace the oil pressure gauge wire: If your oil pressure gauge isn't working, you can trace the wire from the gauge back to the switch. Be careful not to damage any wires during this process.

Remember to disconnect the negative battery terminal before working on any electrical components in your engine bay.