To open the astroroof, push the rear  of the  switch once 
and  the astroroof  will open  to  the  vent position only. 
You  will need to open the sunshade  by hand. 
Push  the rear  of the switch 
a second time and the 
astroroof will open the remainder 
of the  way  by  itself. 
This  is  the express-open  feature. 
To close the astroroof, push and hold  the  front of the 
switch  until the sunroof motor stops. The sunshade can 
only be closed  by hand. 
Cellular  Phone  Readiness  Package 
(If Equipped) 
Your  vehicle  may be equipped with  a wiring harness that 
will  work  with  a dealer-installed 
GM Hughes@ portable 
phone. The phone has integrated features with the radio 
and car  audio speakers.  See your dealer for more details. 
OnStar System (Option) 
Your  vehicle has  been prewired  for  dealer  installation  of 
the OnStar  System.  The  following  services are available 
24 hours  a  day: 
0 Roadside  Service with Location 
0 Emergency Services Button 
0 Remote Door Unlock 
Theft  Vehicle  Tracking 
Automatic Notification  of Air Bag Deployment 
Concierge/Customer Conveniences Services 
For more information, contact your dealer. 
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