I did it!!! The EGR bolt finally gave in. I whacked the wrench with a hammer, fortunately in the correct direction.... towards the firewall. So the answer to my question is the bolt turns clockwise.

It's hard to believe that maybe a little more than a year ago I was afraid to remove the engine cover off the motor. Thanks to this site, and the confidence that it's given me, I have now completed some fairly complex tasks and probably saved myself a bundle. Some day I too will be a 'Zu master. <img src="/forums/images/graemlins/shiner.gif" alt="" />

My CEL is still lit. I checked the codes and they are the same that I was getting before this whole ordeal. P0171, 172, 174, and 175. The engine no longer has such a pronounced vacuum leak sucking sound, but I thought I still heard something on the passenger's side. I couldn't get the motor to flinch, however, by spraying carb cleaner around the gaskets. It must just be me being critical of the usual engine sounds. I was thinking that the OBDII codes would be erased once I reconnected the battery. I only disconnected the ground wire though as per my instructions, maybe the red needed to be disconnected???

Well, it's off to inspections and emissions <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> testing tomorrow. We'll see if they can find any problems. Thanks again for the assistance fellas! <img src="/forums/images/graemlins/cheers.gif" alt="" />