Commercial versions of Nissan's next-generation Titan pickup will be aimed at the Chevrolet Silverado 2500 and Ford F-250 pickups.

The new Titan pickup will debut as a 2009 model. It will be developed on Nissan's re-engineered platform for full-sized trucks. The current Titan competes with the Silverado 1500 and F-150 pickups and is limited to two models: the King Cab and Crew Cab.

The Titan engineered for commercial applications will be "heavier than we have today; more substantial," Jed Connelly, Nissan's senior vice president of sales and marketing, said at the Geneva auto show.

It will be a truck that requires a "diesel application and some other things," he said. But he said that Nissan will not offer a heavy-duty model in that time frame to compete with the Silverado 3500 or Ford F-350 Super Duty pickups.

Although a diesel is a requirement for the re-engineered Titan, a six-cylinder engine to create a lower-priced model is not. The 2006 Titan pickup comes standard with a 5.6-liter V-8. The base Silverado and F-150 come with a V-6.

He said limited sales volume for a six-cylinder engine may not justify offering that engine.

The commercial versions of the Titan will be aimed at "smaller fleets, three to five trucks, plumbers, carpenters, those type of entrepreneurs," said Connelly.