GM officially began advertising in the L.A. Times on Monday with a full-page ad of its 2006 Pontiac Solstice. The boycott began in April because GM disagreed with the coverage of its vehicles in the Tribute Co.-owned newspaper. GM and the L.A. Times have apparently agreed to disagree on some matters. GM is feeling better enough about their discussions to resume buying ad space. We will see how the L.A. Times will cover GM from now on. With such a large paper and such a large advertiser, the typical distinction between the editorial and advertising departments can get blurred very quickly.