All about tires

Everything you wanted to know about tires.

Example- P 235 / 60 / R-16 97S

(P) Passenger (P-Metric) Tire- The United States version of a metric tire sizing system. The letter P as the first character in the tire size means a passenger vehicle tire engineered to standards set by the U.S. Tire and Rim Association.

Rotate tires every 6,000 miles. See this picture for proper procedure. On many late model Chevrolet, Buick, Pontiac, GMC, Cadillac and Oldsmobile cars and trucks, the Tire Pressure Monitor(TPM) system must be relearned so the system will know where each tire is located.

One way to tell when it is time for new tires is to check the tread wear indicators, which will appear when your tires have only 1/16 inch (1.6 mm) or less of tread remaining. These indicators are flat spots between the treads.

Tires should be checked for abnormal wear patterns periodically. Just rub your hand around the tire and feel for roughness, flat spots, or feathering.

Does you car need a Front End Alignment?

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How Things Work

Air Conditioning System Operation

The A/C system provides the following features:

Cooled or dehumidified air for the comfort of the occupants
Power ventilation
Windshield defrosting
Side window defrosting

During most operating conditions, outside air enters the vehicle in the following manners:

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Common Engine Codes

Evaporative Emissions Leak Code P0440 - P0455

P0440 - P0455
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED .

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