Navistar Streamlines Customer Service with Service PartnerSM

Warrenville, Ill. (April 10, 2008) — Fleet customers and service locations throughout North America will get trucks back on the road faster with more predictable costs with the new Service PartnerSM program announced today by Navistar.

Through an Internet-based service pricing application, Service Partner is designed to improve customer satisfaction by identifying the unique service requirements of fleet customers.

"Our fleet customers benefit from the improved customer experience and standardization that Service Partner delivers," said Vaughn Allen, vice president, global service for Navistar. "Service Partner offers participating fleets fair and consistent labor times, expedited diagnostic advisories and accurate repair estimates."

With Service Partner, estimates can be quickly and easily emailed to fleet managers or posted to the Service Partner Internet portal for approval after Service Partner preloads a participating fleet's vehicle identification numbers (VINs). More than 250 of the most common types of vehicle repairs are locked in using consistent labor times. Customers wishing to become a Service Partner member must be enrolled in Navistar's Fleet Charge® program to ensure that they also receive consistent, nationwide parts pricing.

International dealers use Navistar's estimating system across the U.S. and Canada to create consistent, professional estimates for designated fleets, gain access to fleet-specific operations and checklists, and customized service requirements. There is a nominal charge for participating fleets for Service Partner portal maintenance and support.

About Navistar

Navistar International Corporation (NYSE: NAV) is a holding company whose subsidiaries and affiliates produce International® brand commercial and military trucks, MaxxForce® brand diesel engines, IC Bus™ brand school and commercial buses, Monaco® RV brands of recreational vehicles and Workhorse® brand chassis for motor homes and step vans. The company also provides truck and diesel engine service parts. Another affiliate offers financing services. Additional information is available at www.Navistar.com.

Media contact: Steve Schrier, 630-753-2264
Investor contact: Heather Kos, 630-753-2406
Website: www.Navistar.com/newsroom