CHANGING THE PASSLOCK(tm) COMPONENTS
WARNING: This page is about a different car, the 2002 GMC Savana, 2002 Chevrolet Chevy Express, 2001 GMC Savana, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
The following components contain codes or passwords, or must learn codes or passwords for the Passlock(tm) system to allow the vehicle to start.
- Ignition Lock Cylinder Case (Passlock(tm) Sensor)
- Theft Deterrent Control Module (Passlock(tm) Module)
- Powertrain Control Module (PCM)
If any of these parts are replaced, a learn procedure must be performed. Go to
PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS
. If parts are replaced and a learn procedure is not performed, the engine will crank and will not run or will start and stall for 10 minutes. This is long tamper mode. If this occurs, system must go through a long tamper mode cycle. During this time, SECURITY indicator will flash for 10 minutes and DTC B3031 will set. Passlock(tm) module and PCM require full 10 minutes in order to complete a learn cycle. Ignition switch must remain in RUN position until SECURITY indicator stops flashing. Cycle will need to be repeated if ignition switch does not remain in RUN position.