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Seed And Key

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: This procedure requires a CD-ROM database containing PASSLOCK(R) seed and key algorithm loaded on a computer with class 2 capability and a Tech 2 scan tool (or equivalent).
NOTE: This procedure allows relearning of PASSLOCK(R) module or VCM learned data code after replacement of PASSLOCK(R) module, PASSLOCK(R) sensor or VCM. DTC B3031 will set when entering programming mode.
  1. Clear all VCM and PASSLOCK(R) DTCs. Turn ignition off. Replace component(s) as necessary. With transmission in Park (A/T) or Neutral (M/T), turn ignition switch momentarily to START position (DO NOT start engine). Leave ignition in RUN position (engine off).
  2. Using scan tool or computer connected to DLC, select PASSLOCK(R) REQUEST DEVICE CONTROL. If SECURITY indicator light flashes, indicating request device control is denied, select UNLOCK MODULE SECURITY to initiate seed and key learn sequence. After issuing a request seed, access CD-ROM database for algorithm to unlock PASSLOCK(R) module or VCM, whichever was not replaced.
  3. Select REQUEST DEVICE CONTROL and ensure DEVICE CONTROL ENABLED is displayed. SECURITY indicator light should remain illuminated for 10 minutes, then turn off. Procedure will be completed during next start attempt. Clear all DTCs. If VCM was replaced, reprogram VCM. See appropriate REMOVE/INSTALL/OVERHAUL article in ENGINE PERFORMANCE section:
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