How many 02 sensors does a 2002 Chevy silverado v-6 have?

A 2002 Chevy Silverado V6 typically has one O2 sensor per catalytic converter. Since it has one catalytic converter, it usually has one O2 sensor. However, some configurations *might* have a second sensor downstream for monitoring catalytic converter efficiency, bringing the total to two. To be absolutely certain, you should check your vehicle's repair manual or a parts diagram specific to your exact engine code (found on a sticker under the hood).