Interesting.... GM dealer has 2 02 sensors for about 300 even... im thinking that is way over priced.... one located after the cat and one in the mainfold. This is a bad price eh? about 140 each he said. Also i was wondering if there are any sort of kits to clean up your engine bay for various wires ect. such as WillWrens. Curious exactly where and how he replaced all of that. Stupid questions but im learning. lol. Thanks...

Order it from gmpartsdirect.com like I stated. It is $47 shipped to your door. The dealer is a rip-off. You will most likely only need the one before the CAT.

This is not a performance-related thread...moving to the correct forum. Please make different threads for different questions, and post in the correct section. I realize you are new so I won't expect a huge change right away (Start a new thread in "Detailing and Appearance" for your engine bay question. )