Cadillac sales continue to sputter at General Motors. In fact, the brand is the only make at GM that has seen a year over year sales decline for the period ending in September at a time when the auto industry was booming. Specifically, Cadillac has logged in 127,837 sales for the first nine months of 2014 compared to 133,414 in 2013 for a sales decline of 4.2 percent. GM will now offer frequent flyer miles to help spur sales at the division. The marketing move at GM follows a decision to relocate Cadillac's sales team to New York City....