This is a great example of real voice vs. fake PR. The last post generated 43 ads in 48 hours.
Step 1. Review the funny ads.
Step 2. Make your Own (link is to the right bottom of any ad)
Step 3. Post your link (so we can save this.)
Step 4. Pick the date Chevy folds and takes down the site.
My favorites:
Funny Chevy Ad - Hot hot
http://www.chevyapprentice.com/view.php?country=us&uniqueid=a211be06-122e-1029-98eb-0013724ff5a7