WASHINGTON, May 20 (Reuters) - A trade group representing General Motors, Toyota Motor, Volkswagen and nearly all other major automakers on Monday backed two key portions of new U.S. rules to dramatically cut vehicle emissions through 2032.

The Alliance for Automotive Innovation said it was filing in support of the Environmental Protection Agency in including electric vehicles in fleetwide averaging of emissions and excluding upstream emissions from compliance calculations. (Reporting by David Shepardson; Editing by Leslie Adler)