The strike against General Motors by 49,000 United Auto Workers entered its second week Monday with progress reported in negotiations but no clear end in sight. A person briefed on the negotiations says they’re haggling about wages and profit sharing, new product for factories that GM wants to close, a faster route to full wages for new hires, and use of temporary workers. Already the strike forced GM to shut down two Canadian factories that make engines, older-model pickup trucks and two car models.