Detroit — General Motors Corp. launched a new incentive campaign on its full-size Chevrolet and GMC brand pickup trucks, the Wall Street Journal reported Monday. The automaker will now offer customers zero-percent financing on loans lasting as long as 60 months.

Available on extended-cab and crew-cab editions of the trucks, the new offer began Saturday and will remain in place until Sept. 4. The newspaper quoted a GM spokesman as saying the offer is an effort to "be competitive in an already very competitive marketplace." Regular cab models, which represent a minority of the lineup, are excluded from the offer.

With its new offer GM is going after aggressive truck incentives being offered by rivals Ford Motor Co., DaimlerChrysler AG's Chrysler Group, and Toyota Motor Corp. Ford currently is offering zero-percent financing and $2,007 cash back on pickups and SUVs, and Toyota is offering zero-percent financing, or at least $3,000 cash back on its Tundra pickup.