I know they are o2 failures, but I need more details. Heathers car is running like *** after an over heat, although it doens't seem to be burning coolant, nor running hot(anymore) i am suspecting a head gasket.

Anybody have a GM book they can give me more details on those codes? my book is at my shop right now.. thanks

 

All I have is the Haynes , code 13 says its the circuit, and 63 is the right bank heated/open circuit indicated......check for loose or broken connectorssss.....

Hope this helps....

 

I know its a PITA but if you suspect a head gasket do a comprssion check and go from there. it'll run like *** if the o2 signals are way off or the cats could have gotten clogged.