yet another aduana question concerning vehicle permit

[The Duck]

...just for a day. If your tourist card still has 'time' on it why not just walk across the bridge and back? But then again if the purpose of your trip is to pick up your FM3/2 you had better turn your permit in as you'll need a new one under your enhanced immigration status - of course on driving across the bridge into TX w/ expired TX tags you may get stopped [that's why I changed my TX title and tags to South Dakota - a lot more inconspicuous on my occasional trips to Laredo]