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:
Service Bulletins
Service Bulletins give additional
technical service information
needed to knowledgeably service
General Motors cars and trucks.
Each bulletin contains instructions
to assist in the diagnosis ...
STS adds direct-injection V-6
For 2008, STS will be the first GM vehicle equipped with a new 3.6-liter
direct-injected V-6 engine. The new base powerplant, with 298 horsepower (222
kW), delivers 40 more horsepower; and torque ...
Engine Air Cleaner/Filter
See Engine Compartment Overview for the location of the engine air
cleaner/filter.
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance inte ...