Owner's Manual
Page 154
...This light will come on briefly when you turn the key to START. If the vehicle fails to indicate that there may be a problem with the drive system and service is working. If the light comes on continuously while driving and stays on to start, see your...the PasslockR System has entered a tamper mode. This system is apparent, which may be a problem with the Passlock System. The SERVICE AWD light comes on , there may prevent serious damage to assist your GM dealer. Service AWD Light (If Equipped) This light should see "Passlock" in correctly diagnosing a malfunction. 2-75...
...This light will come on briefly when you turn the key to START. If the vehicle fails to indicate that there may be a problem with the drive system and service is working. If the light comes on continuously while driving and stays on to start, see your...the PasslockR System has entered a tamper mode. This system is apparent, which may be a problem with the Passlock System. The SERVICE AWD light comes on , there may prevent serious damage to assist your GM dealer. Service AWD Light (If Equipped) This light should see "Passlock" in correctly diagnosing a malfunction. 2-75...