CUSTOMER ASSISTANCE CUSTOMER ASSISTANCE The satisfaction and good will of the owners of Detroit Diesel engines are of primary concern to Detroit Diesel Corporation and its distributor/dealer organizations. See Figure 40 for Detroit Diesel NAFTA On-Highway service regions. Figure 40 Detroit Diesel NAFTA On-Highway Service Regions 138 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION