not so sure, but this could be in the GM programming.. you would need to scan through the NCSExpert to see if there is anything to that effect - like the "follow home" lights, you can have some lights shine and some - not... on mine i turned off the xenons and turned on the high beams, so not to burn the xenons unnecessary... you can program the "closing" into the keyfob... so there might be something for the sequence too...