Active Fuel Management; (3.9L V6 And 5.3L V8 Engines); Automatic Transaxle Operation - Chevrolet Impala 2007 Owner's Manual

How long should you keep the coolant heater
plugged in? The answer depends on the outside
temperature, the kind of oil you have, and
some other things. Instead of trying to list
everything here, we ask that you contact your
dealer in the area where you will be parking your
vehicle. The dealer/retailer can give you the
best advice for that particular area.

Active Fuel Management™

(3.9L V6 and 5.3L V8 Engines)

Your vehicle's engine may be equipped with
Active Fuel Management™. This system allows
the engine to operate on either all or half of
its cylinders, depending on your driving conditions.
When less power is required, such as cruising
at a constant vehicle speed, the system will
operate in the half cylinder mode, allowing your
vehicle to achieve better fuel economy. When
greater power demands are required, such
as accelerating from a stop, passing, or merging
onto a freeway, the system will maintain
full-cylinder operation.
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Automatic Transaxle Operation

Your automatic transaxle has a shift lever on the
steering column or on the console between
the seats.
There is a display, located on the instrument panel
cluster that will indicate the gear the vehicle is in.
Maximum engine speed is limited on automatic
transaxle vehicles while you are in PARK (P)
or NEUTRAL (N) to protect driveline components
from improper operation.
There are several different positions for the shift
lever.
PARK (P): This position locks your front wheels.
It is the best position to use when the engine
is started because your vehicle cannot move
easily.