Tread wear
The tread wear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified U.S. Government test course. For example, a tire graded 150 would wear one and one-half 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 conditions.
See also:
Working on the vehicle
WARNING
When working on the vehicle, engage the parking brake and shift the automatic
transmission into park position P. Otherwise the vehicle could roll away which could
result in an accide ...
Transmission positions
Park position
Do not shift the transmission into position P() unless the vehicle
is stationary. The parking lock should not be used as a brake when parking. In addition
to engaging the parking lo ...
Under the Hood
Depending on the model, there are two engine options that can be teamed with
a five- or seven-speed automatic transmission.
G550's V-8 produces 382 horsepower and 391 pounds-feet of torque and tea ...