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Online Help

Welcome to online help for Tractor-Trailer and Medium-Duty Truck, your complete source of service and repair information for all Class 4 through 7 Tractors, Trailers, and Dry Vans from 1990 to current model year. Built on the same proven technology as Mitchell's, Tractor-Trailer and Medium-Duty Truck are easy to learn and use, featuring Mitchell 1's proprietary CircuitSelect™ Scalable Vector Color Wiring Diagrams and proven search and navigation features.

Click any link to the left to find detailed help information or click "Contact Us" at the top of the screen for additional support. Use our Product Content Support form for inquiries related to Truck repair content.


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