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:
Chemical Paint Spotting
Airborne pollutants can fall upon and attack painted vehicle surfaces causing
blotchy, ring-shaped discolorations, and small, irregular dark spots etched into
the paint surface. ...
Global Positioning System (GPS)
The navigation system determines the position of the vehicle by using satellite
signals, various vehicle signals, and map data.
At times, other interferences such as the satellite condition, road c ...
Other Information
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any use of such marks by General Motors is under license.
Other trademarks and trade names are those of their respectiv ...