2000 GMC SIERRA ECO mode

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1-50 Where to Put the Restraint
(Regular Cab Pickup)
The child restraint must be secured properly in the right
front passenger seat. If you want to secure a rear
-facing
child restraint in the right front passenger's seat, turn off
the passenger's air bag. See ªAIR BAG OFF Switchº
and ªSecuring a Child Restraint in the Right Front Seat
Positionº in the Index for more on this, including
important safety information.
CAUTION:
A child in a rear-facing child restraint can be
seriously injured or killed if the right front
passenger's air bag inflates. This is because the
back of the rear
-facing child restraint would be
very close to the inflating air bag. Be sure to turn
off the air bag before using a rear
-facing child
restraint in the right front seat position.
Keep in mind that an unsecured child restraint can move
around in a collision or sudden stop and injure people in
the vehicle
-- even when no child is in it.
Where to Put the Restraint
(Extended Cab Pickup)
Accident statistics show that children are safer if they
are restrained in the rear rather than the front seat. We at
General Motors therefore recommend that you put your
child restraint in the rear seat. There is limited space in
the rear seating area of an extended cab model. If you
want to secure a child restraint in a rear seating position
of an extended cab model, especially in the rear center
position, be sure to study the instructions that came with
your child restraint to see if there is enough room to
secure your seat properly.
If you want to secure a rear
-facing child restraint in the
right front passenger's seat, turn off the passenger's air
bag. See ªAIR BAG OFF Switchº and ªSecuring a
Child Restraint in the Right Front Seat Positionº in
the Index for more on this, including important
safety information.

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2-5
If your vehicle has this
power door lock switch,
press the bottom of the
switch on either front door
to lock all the doors at once.
Press the top of the switch to unlock all the doors
at once.
The power door locks will operate at any time without
the ignition being on.
The power door locks will also automatically lock when
the vehicle reaches 15 mph (24 km/h). To unlock the
doors, refer to the instructions listed previously. The
automatic locking feature can be disabled, if you prefer.
See your dealer for assistance.
Operating the power locks may interact with the
theft
-deterrent system (if equipped). See ªContent
Theft
-Deterrentº in the Index.
Programmable Automatic Door Locks
(If Equipped)
Your vehicle may be equipped with an auto lock/unlock
feature which enables you to program your power door
locks. The following instructions detail how to program
your door locks.
To enter the program mode you need to:
1. Pull back on the the turn signal/multifunction lever
all the way toward you and hold it while you
perform the next step.
2. Beginning with the ignition in OFF, turn your key to
ON. Return it to OFF and turn to ON again. Then
return it to OFF. Once you do this, you will hear the
lock switch lock and unlock.
3. You are now ready to program the automatic door
locks. You will have ten seconds to program once
you release the turn signal/multifunction lever.
The following is a list of the available
programming options:

Press the lock side of the lock switch on the driver's
side door panel once to turn on the automatic door
lock feature. All doors lock. No doors will unlock.

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2-6

Do the same twice to turn off the automatic door
lock feature. No doors will lock or unlock. Auto
unlocking will not work if auto locking is turned off.

Press the unlock side of the lock switch on the door
panel once to unlock the driver's door and lock all
other doors.

Do the same twice to unlock all the doors. All doors
lock and unlock. (This is the factory setting).

Do the same three times to turn off the automatic
door lock feature. No doors will lock or unlock.
You can exit the program mode any time by turning the
ignition to ON.
The automatic lock feature will lock all the doors when the
vehicle speed is greater that 15 mph (24 km/h) for two
seconds. Your vehicle left the factory programmed to have
all the doors unlock once the key is removed from the
ignition and lock when vehicle speed exceeds 15 mph
(24 km/h). See your dealer for more information.
If the lock/unlock switches are not pressed while in the
programming mode, the respective auto lock/unlock
setting will not be modified.Lockout Prevention
To protect you from locking your key in the vehicle, this
feature stops the power door locks from locking when
the keys are in the ignition and a door is open.
If the power lock switch is pressed when a door is open
and the key is in the ignition, all of the doors will lock
and then the driver's door will unlock.
Keyless Entry System (If Equipped)
If your vehicle has this feature, you can lock and unlock
your doors from about 3 feet (1 m) up to 100 feet (30 m)
away using the remote keyless entry transmitter supplied
with your vehicle.
Your keyless entry system operates on a radio frequency
subject to Federal Communications Commission (FCC)
Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference,
and (2) this device must accept any interference
received, including interference that may cause
undesired operation.

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2-24 Tow/Haul Mode Selector Switch
(Automatic Transmission)
Your vehicle is equipped with a tow/haul mode. The
selector switch is located on the end of the column shift
lever. You can use this feature to assist when towing or
hauling a heavy load. See ªTow/Haul Modeº in the
Index for more information.
Manual Transmission Operation
5-Speed (VORTEC 6000 V8 Engine)
Here's how to operate
your transmission.
FIRST (1) is intended only for heavy loads or trailer
towing and is not recommended for normal driving.
During the first 500 miles (805 km) of vehicle use, start
your vehicle moving in FIRST (1). This allows clutch
components to break
-in properly.
FIRST (1): Press the clutch pedal and shift into
FIRST (1). Then, slowly let up on the clutch pedal as
you press the accelerator pedal. Shift into FIRST (1)
only when the vehicle is below 5 mph (8 km/h). If you
try to shift down into FIRST (1) at excessive vehicle
speeds, the shift lever will not move into the FIRST (1)
position until vehicle speed is reduced.

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2-31
You can choose among four driving settings:
2HI: This setting is used for driving in most street and
highway situations. Your front axle is not engaged in
two
-wheel drive. This setting also provides the best
fuel economy.
AUTO 4WD: This setting is ideal for use when road
conditions are variable. When driving your vehicle in
AUTO 4WD, the front axle is engaged, but the vehicle's
power is sent only to the rear wheels. When the vehicle
senses a loss of traction, the system will automatically
engage four
-wheel drive. Driving in this mode results in
slightly lower fuel economy than 2HI.4HI: Use 4HI when you need extra traction, such as
on snowy or icy roads or in most off
-road situations.
This setting also engages your front axle to help drive
your vehicle. This is the best setting to use when
plowing snow.
4LO: This setting also engages your front axle and
delivers extra torque. You may never need 4LO. It sends
maximum power to all four wheels. You might choose
4LO if you are driving off
-road in deep sand, deep mud,
deep snow and climbing or descending steep hills.
CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the transmission
is in PARK (P). You or someone else could be
seriously injured. Be sure to set the parking
brake before placing the transfer case in
NEUTRAL. See ªParking Brakeº in the Index.
NEUTRAL: Shift the vehicle's transfer case to
NEUTRAL only when towing your vehicle. See
ªRecreational Vehicle Towingº or ªTowing Your
Vehicleº in the Index for more information.

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2-42
Windows
Manual Windows
Turn the hand crank on each door to raise or lower
manual windows.
Power Windows (If Equipped)
If you have the optional
power windows, the
controls are located on each
of the side doors.The driver's door has a switch for the passenger window
as well. Your power windows will work when the
ignition has been turned to ACCESSORY or RUN or
when Retained Accessory Power (RAP) is present. See
ªRetained Accessory Powerº in the Index.
Press the rear of the switch with the power window
symbol on it to lower the window.
Press the front of the switch with the power window
symbol on it to raise the window.
The driver's window also has an express down feature
that allows the window to be lowered without holding
the switch. Press and hold the rear of the window switch
for one second to activate the express down mode. The
express down mode can be canceled at any time by
pressing the opposite side of the switch. To open the
window partway, lightly tap the switch until the window
is at the desired position.

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2-76
You can only drive for a short time with the reading in
either warning zone. If you must drive, turn off all
unnecessary accessories.
Readings in either warning zone indicate a possible
problem in the electrical system. Have the vehicle
serviced as soon as possible.
Shift Light (If Equipped)
This light is used on
some models with
manual transmissions.
The SHIFT indicator light will help you get the best fuel
economy. See ªShift Lightº or ªShift Speedsº in the
index for more information.
Brake System Warning Light
With the ignition on, the brake system warning light
will flash when you set the parking brake. The light will
flash if the parking brake doesn't release fully. If you
try to drive with the parking brake engaged, a chime
will sound when the vehicle speed is greater than
3 mph (5 km/h).
Your vehicle's hydraulic brake system is divided into
two parts. If one part isn't working, the other part can
still work and stop you. For good braking, though, you
need both parts working well.
If the warning light comes on, there could be a brake
problem. Have your brake system inspected right away.
This light should come
on briefly when you turn
the ignition key to RUN.
If it doesn't come on then,
have it fixed so it will be
ready to warn you if there's
a problem.

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2-86 TRANS FLUID HOT
If you have an automatic transmission, you have a
transmission temperature warning display contained in
the message center.
If the transmission fluid
temperature becomes high,
the message center will
display this message.
When the transmission enters the protection mode you
may notice a change in the transmission shifting
patterns. When the transmission fluid temperature
returns to normal, the display will turn off and the
transmission shifting patterns will return to normal.
NOTICE:
If you keep driving your vehicle with the
transmission TRANS FLUID HOT message
displayed, you can damage the transmission.
This could lead to costly repairs that may not be
covered under your warranty.
The following situations can cause the transmission to
operate at higher temperatures:

Towing a trailer

Hot outside air temperatures

Hauling a large or heavy load

Low transmission fluid level

High transmission fluid level

Restricted air flow to the radiator and the auxiliary
transmission oil cooler (if equipped).
A temporary solution to hotter transmission operating
temperatures may be to let the transmission cool down.
If the transmission is operated at higher temperatures on
a frequent basis, see ªScheduled Maintenanceº in the
Index for the proper transmission maintenance intervals.