GM Service Manual Online
For 1990-2009 cars only

Scan Tool Output Control

Additional Menu Selection(s)

Description

Daytime Running Lamps

Lamp Test

The BCM actuates the DRL relay when you select ON. The headlamps should illuminate until commanded OFF.

Horn Relay

Miscellaneous Test

The BCM actuates the horn relay for 5 seconds when you select ON. The horn should sound for 5 seconds.

Security LED

Miscellaneous Test

The BCM actuates the security LED when you select ON. The security LED should illuminate until commanded OFF.