Chevrolet 2006 HHR Owner's Manual page 106

AUTOMATIC OVERDRIVE (D): This position is for
normal driving with the automatic transaxle. If you need
more power for passing, and you are:
•
Going less than about 35 mph (55 km/h), push your
accelerator pedal about halfway down.
•
Going about 35 mph (55 km/h), push your
accelerator all the way down.
INTERMEDIATE (I): This position is also used for
normal driving. However, it offers braking from
the engine for slight downgrades where the vehicle
would otherwise accelerate due to steepness of grade.
If repetitive shifts occur between third and fourth
gears on steep uphills, this position can be used to
prevent repetitive shifting. Fuel economy will be lower
than AUTOMATIC OVERDRIVE (D). Here are some
times you might choose INTERMEDIATE (I) instead of
AUTOMATIC OVERDRIVE (D):
•
When driving on hilly, winding roads.
•
When towing a trailer, so there is less shifting
between gears.
2-28
LOW (L): This position gives you even more power
but lower fuel economy than INTERMEDIATE (I).
You can use it on very steep hills, or in deep snow or
mud. If the shift lever is put in LOW (L), the transaxle
will not shift into LOW (L) 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 transaxle. If you are stuck,
do not spin the tires. When stopping on a hill,
use the brakes, or parking brake to hold the vehicle
in place.
Manual Transaxle Operation
This is the shift pattern.