GM Service Manual Online
For 1990-2009 cars only
Table 1: Remote Unlock Verification
Table 2: Remote Lock Verification

Remote Unlock Verification

Mode

Description

Mode 1

Feature disabled. No headlamps flash nor horn sounds when unlocking doors using the keyless entry transmitter.

Mode 2

Horn sounds when pressing unlock on the keyless entry transmitter.

Mode 3

Headlamps flash when pressing unlock on the keyless entry transmitter.

Mode 4

Headlamps flash and horn sounds when pressing unlock on the keyless entry transmitter.

Changing the Remote Unlock Verification Mode

Two ways to change the remote unlock verification mode:

    • Scan tool method. Refer to scan tool user's manual for more information.
    • Without a scan tool, describe next:
  1. Close all vehicle doors.
  2. Turn the ignition switch on.
  3. Press and hold unlock on either door lock switch.
  4. While holding unlock on the door lock switch, press and release unlock on the keyless entry transmitter.
  5. Note: The BCM sounds the chime a number of times equal to the current remote unlock verification mode.

  6. To advance the mode: Press and release unlock again on the keyless entry transmitter.
  7. • The BCM sounds the chime a number of times equivalent to the remote unlock verification mode. A transition past mode 4 repeats the sequence starting with mode 1.
    • To exit and save the current customization mode: Release the door lock switch when obtaining desired mode.

If unable to change modes refer to Body Control Module Diagnostic Information in Body Control System for diagnosis and repair.

Remote Lock Verification

Mode

Description

Mode 1

Feature disabled. No headlamps flash nor horn sounds when locking doors using the keyless entry transmitter.

Mode 2

Horn sounds when pressing lock on the keyless entry transmitter.

Mode 3

Headlamps flash when pressing lock on the keyless entry transmitter.

Mode 4

Headlamps flash and horn sounds when pressing lock on the keyless entry transmitter.

Changing the Remote Lock Verification Mode

Two ways to change the remote lock verification mode:

    • Scan tool method. Refer to scan tool user's manual for more information.
    • Without a scan tool, describe next:
  1. Close all vehicle doors.
  2. Turn the ignition switch on.
  3. Press and hold lock on either door lock switch.
  4. While holding lock on the door lock switch, press and release lock on the keyless entry transmitter.
  5. The BCM sounds the chime a number of times equal to the current remote unlock verification mode.

  6. To advance the mode: Press and release lock again on the keyless entry transmitter.
  7. • The BCM sounds the chime a number of times equivalent to the remote lock verification mode. A transition past mode 4 repeats the sequence starting with mode 1.
    • To exit and save the current customization mode: Release the door lock switch when obtaining desired mode.

If unable to change modes refer to Body Control Module Diagnostic Information in Body Control System for diagnosis and repair.