When General Motors announced that the ad agency in charge of Chevrolet was up for review, the speculation was that its “Chevy Runs Deep” ad campaign could be on the ropes after only one year. Critics say “Runs Deep” doesn’t have the impact of previous campaigns like “See the USA in Your Chevrolet,” “Heartbeat of America” and “Like a Rock,” but GM apparently doesn’t doesn’t see it that way. Funk Flex