9-30 Driving and OperatingWARNING (Continued)firmly on the brake pedal, thevehicle could move very rapidly.You could lose control and hitpeople or objects. Do not shiftinto a drive gear while the engineis running at high speed.Notice: Shifting out of P (Park) orN (Neutral) with the enginerunning at high speed maydamage the transmission. Therepairs would not be covered bythe vehicle warranty. Be sure theengine is not running at highspeed when shifting the vehicle.D (Drive): This position is fornormal driving. It provides the bestfuel economy. If you need morepower for passing, and you are:. Going less than about 55 km/h(35 mph), push the acceleratorpedal about halfway down.. Going about 55 km/h (35 mph) ormore, push the accelerator allthe way down.By doing this, the vehicle shiftsdown to the next gear and has morepower.D (Drive) can be used when towinga trailer, carrying a heavy load,driving on steep hills, or for off-roaddriving. You may want to shift thetransmission to a lower gearselection if the transmission shiftstoo often.The vehicle has a shift stabilizationfeature that adjusts the transmissionshifting to the current drivingconditions in order to reduce rapidupshifts and downshifts. This shiftstabilization feature is designed todetermine, before making anupshift, if the engine will be able tomaintain vehicle speed by analyzingthings such as vehicle speed,throttle position and vehicle load.If the shift stabilization featuredetermines that a current vehiclespeed cannot be maintained, thetransmission does not upshift andinstead holds the current gear.In some cases, this may appear tobe a delayed shift, however thetransmission is operating normally.The vehicle's transmission usesadaptive shift controls thatcompares key shift parameters topre-programmed ideal shifts storedin the transmissions computer. Thetransmission constantly makesadjustments to improve vehicleperformance according to how thevehicle is being used, such as witha heavy load or when temperaturechanges. During this adaptive shiftcontrols process, shifting may feeldifferent as the transmissiondetermines the best settings.When temperatures are very cold,the Hydra-Matic® 6L80 automatictransmission's gear shifting may bedelayed providing more stable shiftsuntil the engine warms up. Shiftsmay be more noticeable with a coldtransmission. This difference inshifting is normal.
