TSB # EL006-05 (Revised 12/21/06) has been issued to address a problem where road salt can cause the alternator to fail, resulting in a "no charge" condition and a charging system malfunction indicator light.
This applies to 03-05 V6's.
As with any TSB, the work will only be done if your truck is demonstrating the problem. (This isn't a recall.) Also, it's free only if you're still covered by the 3/36 bumper-to-bumper warranty.
http://www.alldata.com/tsb/Toyota/11...-05/index.html