Got the Regal back today after 4 days in the shop. The 2.4 L's have a lower and upper portion to the block assembly....sealed together with good ol Permatex black sealant. I guess only some time will tell if the sealant cured correctly. The engine light was a disloged vacuum line....don't know how that occured, but an easy fix.
Bob the Service Advisor at Pellegrino Buick was very accomidating through the entire process, and I thank him for his help. I would also like to thank Matt and Sara from Buick Customer Service for their attention and concern with this issue.
Hopefully, I only have to pay Bob a visit for routine maintanance over the next 2 years.....he probably feels the same way too!