No more improvements were made to the Montana models after the 2005 model year. Pontiac stopped selling them after the 2006 model year in the United States. They continued to be sold in Canada and Mexico until the 2009 model year. GM discontinued the Pontiac division after the 2010 model year. The Pontiac minivans were General Motors' most popular minivans in Canada. The Doraville, Georgia assembly plant which produced the Montana closed on September 26, 2009. The Montana was replaced by GM's Lambda crossover SUVS . Strangely it wasn't replaced by a Pontiac version of the crossovers.