See also:

Manual Transmission
Skip Shift (CTS–V) Under light acceleration, the transmission will only allow shifting from 1 (First) to 4 (Fourth). This helps improve fuel mileage. Under harder acceleration, Skip Shift is ...

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 ...

Starting the Gasoline Engine
Place the transmission in the proper gear by moving the shift lever to P (Park) or N(Neutral). To restart the engine when the vehicle is already moving, use N (Neutral). Notice: Do not try to shi ...