Active Fuel Management - Pontiac Grand Prix 2007 Owner's Manual

To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical
cord. The cord is located above the engine
air cleaner/filter. See Engine Compartment
Overview on page 352 for more information
on location.
3. Plug the cord into a normal, grounded
110-volt AC outlet.
CAUTION:
{
Plugging the cord into an ungrounded
outlet could cause an electrical shock.
Also, the wrong kind of extension cord
could overheat and cause a fire. You
could be seriously injured. Plug the cord
into a properly grounded three-prong
110-volt AC outlet. If the cord will not
reach, use a heavy-duty three-prong
extension cord rated for at least 15 amps.
112
4. Before starting the engine, be sure to unplug
and store the cord as it was before, making
sure to keep it away from moving engine
parts. If this is not done, the cord could be
damaged.
How long should the coolant heater be kept
plugged in? The answer depends on the outside
temperature, the kind of oil that is in the
vehicle, and some other things. Instead of trying to
list everything here, we ask that you contact
your dealer/retailer in the area where the vehicle
will be parked. The dealer/retailer can give you the
best advice for that particular area.

Active Fuel Management™

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.