General Motors Corp is scaling down plans to build cars in Russia with AO AvtoVAZ, signalling continued hesitation of foreign manufacturers to invest there, sources told just-auto.com today. The project was to invest $500m-$600m to produce two types of vehicles under the US automaker's Chevrolet brand: one based on a mid-sized Astra from GM's Adam Opel AG; another derived from AvtoVAZ's new small sports-utility vehicle, currently made in limited volumes as Lada Niva 2123.