Expecting a year of sluggish car sales due to our slumping economy, automakers are innovating to keep their inventory moving.

General Motors Corp. announced today that its 3,900 dealers will have free access to post used car listings on Ebay.

Many of the used car listings on EBay are from dealers, as well as individuals. But this agreement marks the first time a major automaker will leverage the power of the Internet to help its dealers move their used car inventory, GM spokesman Jim Labadie said.

“Dealers understand consumers are migrating online to find their next vehicle,” said Rob Chesney, a vice president at eBay Motors, motors.ebay.com, said in a press release.

An estimated 11 million shoppers search eBay motors each month for vehicles, he added.

The deal means “GM Certified dealers will have millions more eyeballs looking at their inventory,” Mark Mathews, director, GM Used Vehicle Activities, said in the press release.