Pontiac 2007 Solstice Owner's Manual page 84

DRIVE (D): This position is for normal driving.
It provides better fuel economy for your vehicle.
If you need more power for passing, and you are:
•
Going less than 35 mph (55 km/h), push the
accelerator pedal about halfway down.
•
Going about 35 mph (55 km/h) or more, push
the accelerator all the way down.
The transmission will shift down to a lower gear
and have more power.
Downshifting the transmission in slippery road
conditions could result in skidding, see "Skidding"
under Loss of Control on page 208.
Notice: If your vehicle seems to start up
rather slowly or not shift gears when you go
faster, and you continue to drive your vehicle
that way, you could damage the transmission.
Have your vehicle serviced right away. You
can drive in LOW (L) when you are driving less
than 35 mph (55 km/h) and DRIVE (D) for
higher speeds until then.
FOURTH (4): This position is also used for
normal driving. However, it reduces vehicle speed
more than DRIVE (D) without using your brakes.
You might choose FOURTH (4) instead of
DRIVE (D) when driving on hilly, winding roads
and when going down a steep hill.
84
INTERMEDIATE (I): This position is also used for
normal driving. However, it reduces the vehicle's
speed without using your brakes, for slight
downgrades where the vehicle would otherwise
accelerate due to steepness of grade. If constant
upshifting or downshifting occurs while driving
on steep hills, this position can be used to prevent
repetitive types of shifts. You might choose
INTERMEDIATE (I) instead of DRIVE (D) when
driving on hilly and winding roads.
LOW (L): This position reduces vehicle speed
more than INTERMEDIATE (I) without using your
brakes. You can use it on very steep hills, or
in deep snow or mud. If the shift lever is put in
LOW (L), the transmission will not shift into
low gear until the vehicle is going slowly enough.
Notice: Spinning the tires or holding the
vehicle in one place on a hill using only the
accelerator pedal may damage the
transmission. If you are stuck, do not spin the
tires. When stopping on a hill, use the brakes to
hold the vehicle in place.