A new "old rusted truck" found under Metadata / Game Objects / Environment in CAW. You need Pets or a later pack and to place the package in both the mods/packages (Sims3 ) directory and in the "The Sims 3 Create a World Tool/ Packages" directory for the item to show in your game. There is an earlier post explaining how to install items in CAW.
Importing packages into CAW
Old rusted truck (MediaFire)