What year is your truck?
Don't know if it will help, but attached is a picture from the 2006 manual.
Someone at your dealer should be able to help talk you through it. Or, you could pay $10 to access the Toyota Tech Info Web site (
http://techinfo.toyota.com) and download your Owner's Manual in PDF format. (When it opens each section, just use the Save button in Adobe Reader to save the file.)