Originally Posted by ryand73
cool thanks again that is pretty cheap i only have one o2 do i need left or right they offer both you put up left
The number of o2 sensors depends on what emissions package you have on the truck, Federal or CA.
Federal emissions has one cat; and one pre-cat and one post cat o2 sensor.
CA emissions has two or three cats, and two pre-cat and two-post cat o2 sensors.
You only need the upstream...if you have CA emissions, you need both; if you have Federal emissions, you need one.