Buick LaCrosse: Traction – AA, A, B, C - Uniform Tire Quality Grading - Wheels and Tires - Vehicle Care - Buick LaCrosse Owners ManualBuick LaCrosse: Traction – AA, A, B, C

The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire's ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.

Warning: The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.

    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 ...

    Temperature – A, B, C
    The temperature grades are A (the highest), B, and C, representing the tire's resistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions ...

    See also:

    Infotainment system overview
    1 - Sockets for external audio sources (AUX and USB) 2 - Steering wheel keypad 3 - 7" display 4 - Center console control panel ...

    Operating the XM Radio
    To listen to XM Radio, turn the ignition switch to the ACCESSORY (I) or ON (II) position, and press the button. The last channel you listened to will show in the audio screen and the cent ...

    Function
    Park assist button The system is activated automatically when the vehicle is started. The indicator light in the button in the center console illuminates when the system is on. The front park ...