oxygen sensor location 2008 Sieera

[Raff]

Where can I find the Oxegen sensor on a 2008 Sierra work truck.

[RockySierra]

There are several on the truck. Just follow the exhaust system back from the engine.

[rdnkcpa]

Usually 2 right in front of the cats, 2 behind the cats. Follow the exhaust pipes.

[gmtech4]

your question is weird as people often ask for a specific sensor,so to prevent that...

 

bank 1 is driver side ,bank 2 is passenger side

 

sensor 1 is before the cat

 

sensor 2 is after the cat

 

sensors are always refered as bank 2 sensor 1 (for example)