Bank One Cylinder

[jnicks01]

Does anyone know which side of the engine is the bank one (#1 cylinder). Going to get my cat replaced and that is the one throwing the P0420 code. Just want to make sure they replace the right one. I plan on doing both, but not at the same time.

 

[bsamoul]

right side

 

[GMCYukalade]

drivers side would be bank 1 on the cat

 

[jnicks01]

basmoul, by right do you mean driver's side? A little contradiction. Sorry. Thanks guys.

 

[GMCYukalade]

Bank 1 Driver, Bank 2 Passenger -

 

[GMCYukalade]

And trust me - if the Drivers side is going out or gone out - the pass side is not far behind, if not already gone