Retrieve My Number
1. Push 
. System responds:
“OnStar ready.”.
2. Say “My Number.” System responds: “Your OnStar Hands-Free Calling number is.”
See also:
Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire
when tested under controlled conditions on a specified government test course. For
example, a tire graded 150 would w ...
Customer Assistance
Offices (Mexico)
To contact the Customer Assistance
Center (CAC), use the phone
numbers listed in this section.
Customer assistance is available
Monday through Friday, 08:00 to
20:00 hours, and Saturdays from ...
How the System Works
The SBZA symbol lights up in the side mirrors when the system detects a vehicle
in the side blind zone, indicating it may be unsafe to change lanes. Before making
a lane change, check the SBZA dis ...