In its second major creative assignment shift in as many months, General Motors is moving chores on Cadillac to Fallon Minneapolis after just five months at Bartle Bogle Hegarty. Cadillac’s media spending totaled about $250 million last year, and nearly $75 million in the first four months of 2010, per Nielsen. Those figures don’t include online spending, according to Adweek. To add the business, Fallon is severing ties to Chrysler, the story said. Cadillac is among the brands that the new General Motors VP/U.S marketing Joel Ewanick manages. Last month, GM shifted Chevy to Goodby, Silverstein & Partners from Publicis.