Good Site to get Codes, OBD2

Forgive me if its the wrong place to post. I was checking out a Toyota Problem for my dad. They posted this site for reading codes. Doesn't specifically list Chevy, but has the Generic. It was pretty cool.
Check it out.

http://www.equus.com/support/obd2_definitions.php

(http://www.equus.com/support/obd2_definitions.php)

Also;

http://autorepair.about.com/od/obdcodedatabase/The_Exhaustive_Database_of_OBDI_and_OBDII_Engine_C odes.htm