Where is the oil sendin unit on a 1988 Chevrolet cavalier?

On a 1988 Chevrolet Cavalier, the oil sending unit is typically located near the oil filter, on the engine block. It is usually found on the driver's side of the engine, towards the rear. You may need to remove some components for better access, depending on the engine configuration. Always consult the vehicle's service manual for specific details related to your engine type.