How many oxygen sensors on a 1500 Chevy pick up?

A 2015 Chevrolet Silverado 1500 typically has one upstream oxygen sensor (before the catalytic converter) and one downstream oxygen sensor (after the catalytic converter) for each bank of cylinders. Since it's a V8, it has two banks, meaning a total of four oxygen sensors.

However, there's a possibility of more depending on the specific engine configuration and options. Some configurations might have additional sensors for emissions monitoring. To be absolutely certain, check your vehicle's repair manual or a parts diagram specific to your truck's VIN.