Isuzu D-Max Workshop & Owners Manual | Free Download Isuzu D-Max. The Isuzu D-Max is a pickup truck built by automaker Isuzu since 2002. It shares the same platform with several General Motors (GM) mid-size trucks in the United States such as the Chevrolet Colorado, GMC Canyon and Isuzu i-Series. Isuzu D Max Workshop Manuals | WorkshopManual Workshop and owners manuals for the Isuzu D Max. To read online or download as a PDF.