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Technical Resource Guide

Technical Resource Guide

All Western Star X-Series technical details can be found in the Technical Resource Guide (TRG). For access to the TRG, log onto


PLEASE NOTE: All materials below are for legacy Western Star models – 4700, 4800, 4900, 6900 – and are no longer maintained. Please go to the Technical Resource Guide noted above for current X-Series product.

Electrical, cab and general information applicable to EPA2010 legacy models reference V3.2, for all other content and legacy builds built prior to EPA2010 please select V3.1.

The CAD Data (Section 06D) includes Basic 2D Body Builder Drawings available for download in .zip format. To download, right-click on a .zip file, select "Save Target As," and save to your computer. Unzip the file, then view the .dxf Drawings with your CAD software.

DXF Drawings can be loaded by most 2D CAD software. See Section 06D for more details on 2D and 3D CAD format availability.


Comments? Questions?

If you have questions about content in the TRG please use this inquiry form to reach the TEM Assistance Group or if your question is regarding a specific vehicle or concern you can call the Customer Assistance Center by phone at 1-855-253-0426.
Hours of operation: 8:00 am - 7:00 pm (EST) / 5:00 am - 4:00 pm (PST)

You will need the following information during your phone call:

  • Last 6 digits of Serial Number
  • Clear description of what you need to accomplish
  • WST Dealer contact name and phone number
Western Star logo that features 'Serious Trucks' in white text and a red star against a gray background.