Does anyone know to reset the Theft Deterrent Fuel Shut Off on a 2001 Silverado?

I had to replace the Multi Function Switch on the steering column and now I get a code P1626. Evidentally my truck thinks that it's being tampered with and has shut down.

Here is some info...http://en.allexperts.com/q/Auto-Theft-Prevention-2384/2008/4/2001-silverado-passlock.htm