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.
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Other Navigation Services
Available from OnStar
OnStar eNav: Allows subscribers
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Maps™ and MapQuest.com to their
Turn-by-Turn Navigation or
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When ready, the directions will b ...
Service All-Wheel Drive Light
This light should come
on briefly when you turn
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check to show you it
is working.
The service all-wheel drive light comes on to
indicate that there may be a problem with ...
Anti-theft Alarm System Messages
THEFT ATTEMPTED
This message displays if the vehicle detects a tamper condition. ...
