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Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the v ...

Gasoline Specifications (U.S. and Canada Only)
At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB—3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadieny ...

A missing ingredient?
In order to make the CTS Sport Wagon appealing price-wise, the base car is equipped with a 270-hp 3.0L V6, a 6-speed automatic gearbox and RWD. Price: $44,325. Moving up to AWD adds an extra $2,62 ...