2007 CHEVROLET EXPRESS CARGO VAN automatic transmission

Keys............................................................ 102
Remote Keyless Entry (RKE) System........ 104
Remote Keyless Entry (RKE) System
Operation............................................... 105
Doors and Locks........................................ 108
Door Locks................................................ 108
Power Door Locks..................................... 109
Cargo Door Relocking............................... 109
Rear Door Security Locks......................... 110
Lockout Protection..................................... 110
Sliding Side Door...................................... 111
60/40 Swing-Out Side Door....................... 112
Rear Doors............................................... 114
Windows...................................................... 115
Manual Windows....................................... 115
Power Windows........................................ 116
Swing-Out Windows.................................. 117
Sun Visors................................................ 117
Theft-Deterrent Systems............................. 118
Passlock
®.................................................. 118
Starting and Operating Your Vehicle......... 119
New Vehicle Break-In................................ 119
Ignition Positions....................................... 120Retained Accessory Power (RAP)............. 121
Starting the Engine.................................... 122
Fuel Regulator........................................... 123
Engine Coolant Heater.............................. 123
Automatic Transmission Operation............. 125
Parking Brake........................................... 128
Shifting Into Park (P)................................. 129
Shifting Out of Park (P)............................. 130
Parking Over Things That Burn................. 131
Engine Exhaust......................................... 132
Running the Engine While Parked............. 133
Mirrors......................................................... 134
Manual Rearview Mirror............................. 134
Automatic Dimming Rearview Mirror with
Compass and Temperature Display........ 134
Outside Manual Mirror............................... 136
Outside Camper-Type Mirrors.................... 136
Outside Power Mirrors............................... 138
Outside Convex Mirror............................... 138
Outside Heated Mirrors............................. 139
Storage Areas............................................. 139
Section 2 Features and Controls
101

Automatic Transmission Operation
There are several different positions for your
shift lever.
PARK (P):This position locks your rear wheels.
It is the best position to use when you start your
engine because your vehicle cannot move easily.
{CAUTION:
It is dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P)
with the parking brake rmly set. Your
vehicle can roll.
CAUTION: (Continued)
CAUTION: (Continued)
Do not leave your vehicle when the engine
is running unless you have to. If you have
left the engine running, the vehicle can
move suddenly. You or others could be
injured. To be sure your vehicle will not
move, even when you are on fairly level
ground, always set your parking brake
and move the shift lever to PARK (P). See
Shifting Into Park (P) on page 129.Ifyou
are pulling a trailer, seeTowing a Trailer
on page 269.
Make sure the shift lever is fully in PARK (P)
before starting the engine. Your vehicle has an
automatic transmission shift lock control system.
You must fully apply your regular brakes before
you can shift from PARK (P) with the ignition
in RUN.
125

Torque Lock
If you are parking on a hill and you do not shift
your vehicle into PARK (P) properly, the weight of
the vehicle may put too much force on the
parking pawl in the transmission. You may find it
difficult to pull the shift lever out of PARK (P).
This is called torque lock. To prevent torque lock,
set the parking brake and then shift into
PARK (P) properly before you leave the driver’s
seat. To find out how, seeShifting Into Park (P) on
page 129.
When you are ready to drive, move the shift
lever out of PARK (P) before you release the
parking brake.
If torque lock does occur, you may need to have
another vehicle push yours a little uphill to
take some of the pressure from the parking pawl
in the transmission, so you can pull the shift
lever out of PARK (P).
Shifting Out of Park (P)
Your vehicle has an automatic transmission shift
lock control system. You have to fully apply
your regular brakes before you can shift from
PARK (P) when the ignition is in RUN. See
Automatic Transmission Operation on page 125.
If you cannot shift out of PARK (P), ease pressure
on the shift lever and push the shift lever all the
way up into PARK (P) as you maintain brake
application. Then, move the shift lever into
the gear you want.
If you ever hold the brake pedal down but still
cannot shift out of PARK (P), try this:
1. Turn the key to LOCK.
2. Apply and hold the brake until the end of
Step 4.
3. Shift to NEUTRAL (N).
4. Start the vehicle and then shift to the drive
gear you want.
5. Have the system fixed as soon as you can.
130

The StabiliTrak®system may also turn off
automatically if it determines that a problem exists
with the system. If the problem does not clear
itself after restarting the vehicle, you should see
your dealer/retailer for service.
Traction Control Operation
The traction control system is part of the
StabiliTrak®system. Traction control limits wheel
spin by reducing engine power to the wheels
(engine speed management) and by applying
brakes to each individual wheel (brake-traction
control) as necessary.
If the brake-traction control system activates
constantly or if the brakes have heated up due to
high speed braking, the brake-traction control
will be automatically disabled. The system
will come back on after the brakes have cooled.
This can take up to two minutes or longer
depending on brake usage.The traction control system may activate on dry or
rough roads or under conditions such as heavy
acceleration while turning or abrupt upshifts/
downshifts of the transmission. When this happens
you may notice a reduction in acceleration, or
may hear a noise or vibration. This is normal.
Adding non-dealer/non-retailer accessories
can affect your vehicle’s performance. See
Accessories and Modications on page 290for
more information.
All-Wheel Drive (AWD) System
If your vehicle has all-wheel drive, your engine’s
driving power is sent to all four wheels for
extra traction when needed.
This is like four-wheel drive, but there is no
separate lever or switch to engage or disengage
the front axle. It is fully automatic, and adjusts itself
as needed for road conditions.
You may experience a brief vehicle vibration upon
acceleration when driving in slippery conditions.
This is normal and is an indication that the
all-wheel drive system is functioning properly.
238

Dolly Towing
Rear Towing (Rear Wheels Off the Ground)
Two-Wheel-Drive Vehicles
Use the following procedure to tow your vehicle
from the rear:
1. Drive the vehicle onto the dolly.
2. Firmly set the parking brake. SeeParking
Brake on page 128for more information.
3. Put the automatic transmission in PARK (P).
4. Follow the dolly manufacturer’s instructions to
attach and secure the vehicle being towed to
the dolly and then the loaded dolly to the tow
vehicle. Make sure the wheels are straight
before towing.
Use an adequate clamping device to ensure
that the front wheels are locked into the
straight position.5. Release the parking brake only after the
vehicle being towed is firmly attached to
the tow vehicle.
6. Turn the ignition to LOCK.
If the tow vehicle will not be started or driven
for six weeks or more, remove the battery
cable from the negative terminal (post) of the
battery to prevent your battery from draining
while towing.
All-Wheel-Drive Vehicles
Your vehicle was not designed to be towed with
two wheels on the ground. To properly tow
these vehicles, they should be placed on a
platform trailer with all four wheels off the ground.
Notice:Towing an all-wheel-drive vehicle
with all four wheels on the ground, or even
with only two of its wheels on the ground, will
damage drivetrain components. Do not tow
an all-wheel-drive vehicle if any of its wheels
will be on the ground.
268

Press this button
located to the right of
the steering wheel
on the instrument panel
to turn tow/haul
mode on and off.
While activated, the
indicator light on the
instrument panel will
be on.
Tow/haul mode will turn off automatically when the
ignition is turned off. SeeTow/Haul Mode Light
on page 185.
Tow/haul is most effective when the vehicle and
trailer combined weight is at least 75 percent of the
vehicle’s Gross Combined Weight Rating (GCWR).
See “Weight of the Trailer” later in this section.
Driving with tow/haul activated without a heavy
load will cause reduced fuel economy and
unpleasant engine and transmission driving
characteristics, but will not cause damage.Weight of the Trailer
How heavy can a trailer safely be?
It depends on how you plan to use your rig. For
example, speed, altitude, road grades, outside
temperature and how much your vehicle is used to
pull a trailer are all important. It can also depend
on any special equipment that you have on
your vehicle, and the amount of tongue weight the
vehicle can carry. See “Weight of the Trailer
Tongue” later in this section for more information.
Maximum trailer weight is calculated assuming
only the driver is in the tow vehicle and it has all
the required trailering equipment. The weight
of additional optional equipment, passengers and
cargo in the tow vehicle must be subtracted
from the maximum trailer weight.
271

Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have
extra wiring and a heavy-duty turn signal
flasher (included in the optional trailering package).
The arrows on your instrument panel will flash
whenever you signal a turn or lane change.
Properly hooked up, the trailer lamps will also
flash, telling other drivers you’re about to
turn, change lanes or stop.
When towing a trailer, the arrows on your
instrument panel will flash for turns even if the bulbs
on the trailer are burned out. Thus, you may think
drivers behind you are seeing your signal when
they are not. It’s important to check occasionally to
be sure the trailer bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower gearbefore
you start down a long or steep downgrade. If you
don’t shift down, you might have to use your
brakes so much that they would get hot and no
longer work well.
You can tow in DRIVE (D). You may want to shift
the transmission to THIRD (3) or a lower gear
under heavy loads and/or hilly conditions.
When towing at high altitude on steep uphill
grades, consider the following: Engine coolant will
boil at a lower temperature than at normal
altitudes. If you turn your engine off immediately
after towing at high altitude on steep uphill grades,
your vehicle may show signs similar to engine
overheating. To avoid this, let the engine run while
parked (preferably on level ground) with the
automatic transmission in PARK (P) for a few
minutes before turning the engine off. If you do get
the overheat warning, seeEngine Overheating
on page 315.
284

Maintenance When Trailer Towing
Your vehicle will need service more often when
you’re pulling a trailer. See the Maintenance
Schedule for more on this. Things that are
especially important in trailer operation are
automatic transmission fluid (don’t overfill), engine
oil, axle lubricant, belt, cooling system and
brake system. Each of these is covered in this
manual, and the Index will help you find them
quickly. If you’re trailering, it’s a good idea
to review these sections before you start your trip.
Check periodically to see that all hitch nuts and
bolts are tight.
Trailer Wiring Harness
The optional heavy-duty trailer wiring package
includes a seven-wire harness assembly at the rear
of the vehicle and a four-wire harness assembly
under the left hand side of the instrument panel.
The seven-wire harness assembly is taped together
and located in a frame pocket at the driver side rear
left corner of the frame. The seven-wire harness
includes a 30-amp feed wire.Both harnesses come without connectors and
should be wired by a qualified electrical technician.
The technician can use the following color code
chart when connecting the wiring harness to your
trailer and trailer brake controller.
Seven-Wire Harness
•Light Green: Back-up lamps
•Brown: Parking lamps
•Yellow: Left stoplamp and turn signal
•Dark Green: Right stoplamp and turn signal
•Dark Blue: Use for electric trailer brakes
•Red/Black Stripe: Trailer accessory
•White (heavy gage): Ground wire
Four-Wire Harness (Trailer Brake Controller)
•Black: Ground
•Red/White Stripe: Fused Battery
•Dark Blue: Trailer Brake Feed
•Light Blue: Fused Stoplamp/CHMSL
286