Where can I find a serpentine belt diagram for 1991 dodge diesel pickup?

You can find a serpentine belt diagram for a 1991 Dodge diesel pickup in the vehicle's owner’s manual or service manual, which typically includes diagrams for maintenance. Additionally, online resources such as automotive forums, repair websites like AutoZone or Advance Auto Parts, and parts retailers often provide diagrams. You can also check YouTube for instructional videos that may show the belt routing for your specific model.