How many o2 sensor does a 1995 Chevrolet Silverado have?

A 1995 Chevrolet Silverado typically has one O2 sensor. However, this depends on the engine configuration (e.g., V6 vs. V8) and whether it has any additional emissions equipment. While some later model Silverados had more, a '95 usually only had the single sensor in the exhaust system. To be absolutely certain, you should check your vehicle's repair manual or parts diagram based on your specific engine.