Cars.com and Kelley Blue Book have announced the beginning of a partnership first revealed in 2003, under which cars.com will exclusively power Kelley Blue Book's "Blue Book Classifieds" and "Sell Your Car" channels on kbb.com, reported AutoRemarketing.com.

As a part of the deal, Kelley Blue Book will be the only provider of used-vehicle value information on cars.com and its hundreds of co-branded affiliate sites.

Starting this month, the multi-year deal will bring together Kelley Blue Book's vehicle pricing information with cars.com's complete inventory of more than 9 million used vehicles yearly to provide consumers and dealers the most comprehensive resource for pricing, buying and listing used vehicles.

Once the integration is complete, dealers' used-vehicle listings will appear on more than 180 media Web sites and "Blue Book Classified," with a single advertising buy on cars.com.

Buyers visiting any of the Web sites can connect with dealers in several ways, including a toll-free number, e-mail inquiries, links to the dealer's Web site or directions to the dealership. All advertising activity will be compiled in cars.com's Online Ad Reports to help dealers monitor their traffic and measure results.