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 wear one and a half (1½) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.
See also:
Thigh Support Adjustment
If available, adjust the manual leg extension by pulling up on the lever,
and then pulling or pushing on the support to lengthen or shorten it.
Release the lever to lock it in place. ...
Power Folding Mirrors
To fold the mirrors:
1. Press (C) to fold the mirrors out to the driving position.
2. Press (D) to fold the mirrors into the folded position. ...
Storing and Deleting Phone Numbers
The system can store up to 30 phone numbers as name tags in the Hands—Free
Directory that is shared between the Bluetooth and OnStar systems.
The following commands are used to delete and store ph ...