DRL's are staying on after car is placed in park. Getting "Service Vehicle Soon" message as well. If after dark, low beams turn on and ONE high beam. This led me to think the DRL relay may be bad, so I replaced it. No change. Now I am thinking the BCM. If I replace with a new AC Delco BCM, am I correct in thinking that the Passlock will program the first time I turn the key to start the car? Then all I have to do is program the keyfobs through the radio interface? Any other thoughts would be welcome. Thanks.

 

try examining the electrical connectors first to the bcm.
regrease them with dieletric grease

 

Thanks for the reply. Heard about the connectors. I'll give it a try tomorrow and post back the results.

 

Went out this morning to clean and grease the BCM connectors and the DRL's were ON and the battery was almost dead. Unplugged, cleaned and greased the connectors on the BCM, charged the battery and ran the car. The DRL's seem to be acting correctly now. We will see how long that lasts.