Details on the GM summer slowdown

General Motors Corp. announced today that it will idle 13 of its assembly plants for up to 9 weeks this summer, as it works to trim high dealership inventories and put production in line with sluggish sales. For auto suppliers and sub-suppliers interested in how they will be impacted, here's GM's list showing details on the plans for specific plants and vehicles. GM's release notes: At the end of March, approximately 767,000 vehicles were in U.S. dealer stock, down about 108,000 vehicles (or 12 percent) compared with the same period last year, and down 105,000 vehicles from year-end 2008. These new scheduling actions will help reduce U.S. dealer inventory levels to a level of approximately 525,000 vehicles by the end of July.