DETROIT (AP) — General Motors Corp. will announce details of its massive restructuring plan on Monday, including the demise of its storied Pontiac brand, more factory closures and bigger job cuts as it fights to avoid bankruptcy protection.

Two people briefed on GM's plan said the company has decided to close more factories than the five it announced in February. But the locations of the doomed factories will not be identified Monday, said the people, who asked not to be identified because the plan has not yet been made public.

Both people confirmed that the plan includes the death of Pontiac, famous for the Trans Am sports car and the GTO. Efforts in the last few years to market Pontiac as performance-oriented brand failed to work. The company had said it wanted to keep Pontiac as a niche brand with one or two models, but is buckling under tremendous government pressure to consolidate its eight brands, several of which lose money.

The people said GM won't have much new information on Hummer, Saturn or other brands, including Europe's Opel. GM has indicated it wants to focus on four core brands, Chevrolet, Cadillac, GMC and Buick.

GM has indicated it wants to focus on four core brands, Chevrolet, Cadillac, GMC and Buick.