See also:

Tips and Troubleshooting Chart
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Compass Calibration Procedure
1. Before calibrating the compass, check that the compass is set to the correct variance zone. See “Compass Variance (Zone) Procedure” earlier in this section. Do not operate any switches ...

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 ...