General Motors is increasing the powertrain warranty on all its 2007 model vehicles sold in the United States and Canada to five years or 100,000 miles, the automaker said today. GM’s new 100,000 Mile Warranty coverage is a fully transferable five-year, 100,000-mile powertrain limited warranty with no deductible. GM also has decided to expand its roadside assistance and courtesy transportation programs to match the powertrain warranty term. The new warranty will apply retroactively to 2007 GM cars and trucks already sold. For non-powertrain components, GM’s Bumper-to-Bumper New Vehicle Limited Warranty remains in effect: four years or 50,000 miles for Buicks, Cadillacs, Hummers and Saabs, and three years or 36,000 miles for Chevrolets, GMCs, Pontiacs and Saturns. Light duty vehicles sold to small businesses, commercial fleets and rental companies are included in the warranty, with the exception of limousine, hearse, and livery vehicles, which have warranties specific to these vehicles and their applications. Medium Duty trucks are not included due to the variety of warranty options specific to engine, powertrain and chassis.