GM Service Manual Online
For 1990-2009 cars only
Auto. Learn Timer: The scan tool displays 0 to 2550 seconds. The display indicates the current state of the Auto. learn timer, which must time out three times in order for the relearn procedure to be complete.

His. DTC Cyc. Counts: The scan tool displays 0 to 255 counts. The display indicates the number of ignition cycles of the history code.

Lock-Out Timer: The scan tool displays 0 to 2550 seconds. The display indicates the time remaining in the lock-out timer mode. The vehicle theft deterrent (VTD) system will disable sampling of the key code for 3 minutes since a tamper was detected.

Passkey Data Voltage: The scan tool displays 0 to 5 volts. The display indicates the actual calculated voltage value read from the Passkey resistor pellet.

Security Lamp Status: The scan tool displays On, Off or Flash. The display indicates the current state of the SECURITY indicator as commanded via a class 2 message from the body control module (BCM).

Seed and Key Timer: The scan tool displays 0 to 2550 seconds. The display indicates the current state of the Seed and Key timer, which must time out in order for the relearn procedure to be complete.

Theft Data: The scan tool displays 0 to 5 volts. The display indicates the actual calculated voltage value read from the Passkey resistor pellet.

VTD Fuel Disable: The scan tool displays Active or Inactive. The display indicates active when the fuel is disabled by the VTD system because of a detected tamper and inactive in a normal state.