automatic transmission CHEVROLET SILVERADO 2007 1.G User Guide

Torque Lock
If you are parking on a hill and you do not shift
your transmission into PARK (P) properly,
the weight of the vehicle may put too much force
on the parking pawl in the transmission. You
may nd 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 nd out how, seeShifting Into
Park (P) on page 165.
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, then you will be able to
pull the shift lever out of PARK (P).
Shifting Out of Park (P)
Your vehicle has an automatic transmission shift
lock control system which locks the shift lever
in PARK (P) when the ignition is in the LOCK. You
have to fully apply your regular brakes before
you can shift from PARK (P) when the ignition is
in RUN. SeeAutomatic Transmission Operation on
page 140.
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. Move the shift lever into another gear.
167

The main components of your instrument panel are the following:
A. Air Outlets. SeeOutlet Adjustment on
page 247.
B. Turn Signal/Multifunction Lever. SeeTurn
Signal/Multifunction Lever on page 214.
C. Driver Information Center (DIC) Buttons. See
Driver Information Center (DIC) on page 269.
D. Hazard Warning Flasher Button. SeeHazard
Warning Flashers on page 213.
E. Instrument Panel Cluster. SeeInstrument
Panel Cluster on page 249.
F. Shift Lever. SeeAutomatic Transmission
Operation on page 140. Tow/Haul Selector
Button (If Equipped). SeeTow/Haul Mode on
page 146. Range Selection Mode (Allison
Transmission
®and Hydra-Matic®6-Speed
Button (If Equipped). SeeAutomatic
Transmission Operation on page 140.
G. Audio System. SeeAudio System(s) on
page 302.
H. Instrument Panel Storage Area. SeeInstrument
Panel Storage Area on page 199.I. Integrated Trailer Brake Controller (If
Equipped). SeeTowing a Trailer on page 447.
J. Exterior Lamp Controls. SeeExterior Lamps
on page 223.
K. Hood Release. SeeHood Release on
page 498.
L. Parking Brake. SeeParking Brake on
page 164.
M. Dome Lamp Override Button. SeeDome Lamp
Override on page 228. Dome Lamp Knob.
SeeDome Lamps on page 228. Fog Lamp
Button (If Equipped). SeeFog Lamps on
page 226.
N. Cruise Control Buttons. SeeCruise Control on
page 220.
O. Tilt Wheel Lever. SeeTilt Wheel on page 214.
P. Horn. SeeHorn on page 213.
Q. Automatic Transfer Case Control (If Equipped).
SeeFour-Wheel Drive on page 149.
209

E. Shift Lever. SeeAutomatic Transmission
Operation on page 140.
F. Tow/Haul Selector Button (If Equipped). See
Tow/Haul Mode on page 146.
G. Driver Information Center (DIC) Controls. See
Driver Information Center (DIC) on page 269.
H. Audio System. SeeAudio System(s) on
page 302.
I. Exterior Lamps Control. SeeExterior Lamps on
page 223.
J. Integrated Trailer Brake Controller (If
Equipped). SeeTowing a Trailer on page 447.
K. Dome Lamp Override Button. SeeDome
Lamp Override on page 228. Dome Lamp
Knob. SeeDome Lamps on page 228.
L. Automatic Transfer Case Control. (If Equipped).
SeeFour-Wheel Drive on page 149.
M. Hood Release. SeeHood Release on
page 498.
N. Parking Brake. SeeParking Brake on
page 164.
O. Cruise Control Buttons. SeeCruise Control on
page 220.
P. Tilt Wheel Lever. SeeTilt Wheel on page 214.Q. Horn. SeeHorn on page 213.
R. Audio Steering Wheel Controls. SeeAudio
Steering Wheel Controls on page 370.
S. Climate Controls. SeeClimate Control System
(With Air Conditioning ) on page 236or
Climate Control System (Heater Only) on
page 239or Dual Automatic Climate Controls
(If Equipped). SeeDual Automatic Climate
Control System on page 240.
T. Accessory Power Outlets. SeeAccessory
Power Outlet(s) on page 234. Cigarette Lighter
(If Equipped). SeeAshtray(s) and Cigarette
Lighter on page 235.
U. StabiliTrak
®Button (If Equipped). See
StabiliTrak®System on page 384. Pedal Adjust
Button (If Equipped). SeeAdjustable Throttle
and Brake Pedal on page 138. Rear Park Assist
Disable Button (If Equipped). SeeUltrasonic
Rear Parking Assist (URPA) on page 230.
Heated Windshield Washer Fluid Button
(If Equipped). SeeWindshield Washer on
page 219.
V. Passenger Airbag Off Control (If Equipped).
SeeAirbag Off Switch on page 95.
W. Glove Box. SeeGlove Box on page 198.
212

Cruise Control
{CAUTION:
Cruise control can be dangerous where
you cannot drive safely at a steady speed.
So, do not use your cruise control on
winding roads or in heavy traffic.
Cruise control can be dangerous on
slippery roads. On such roads, fast
changes in tire traction can cause
excessive wheel slip, and you could lose
control. Do not use cruise control on
slippery roads.
With cruise control, you can maintain a speed of
about 25 mph (40 km/h) or more without
keeping your foot on the accelerator. This can
really help on long trips. Cruise control does not
work at speeds below about 25 mph (40 km/h).
When you apply your brakes, cruise control
is turned off.If your vehicle has an Allison
®automatic
transmission, see “Grade Braking and Cruise
Grade Braking (Allison Transmission
®) under
Tow/Haul Mode on page 146for an explanation of
how cruise control interacts with the Range
Selection Mode, tow/haul and grade braking
systems.
If your vehicle has the StabiliTrak
®™ system and
begins to limit wheel spin while you are using
cruise control, the cruise control will automatically
disengage. SeeStabiliTrak
®System on
page 384. When road conditions allow you to
safely use it again, you may turn the cruise control
back on.
The cruise control
buttons are located on
left side of the
steering wheel.
220

Average Economy
Press the trip/fuel button until AVG ECONOMY
displays. This display shows the approximate
average miles per gallon (mpg) or liters per
100 kilometers (L/100 km). This number is
calculated based on the number of mpg (L/100 km)
recorded since the last time this menu item was
reset. To reset AVG ECONOMY, press and
hold the set/reset button.
Fuel Used
Press the trip/fuel button until FUEL USED
displays. This display shows the number of
gallons (gal) or liters (L) of fuel used since the last
reset of this menu item. To reset the fuel used
information, press and hold the set/reset button
while FUEL USED is displayed.
Timer
Press the trip/fuel button until TIMER displays.
This display can be used as a timer.To start the timer, press the set/reset button while
TIMER is displayed. The display will show the
amount of time that has passed since the
timer was last reset, not including time the ignition
is off. Time will continue to be counted as long
as the ignition is on, even if another display
is being shown on the DIC. The timer will record
up to 99 hours, 59 minutes and
59 seconds (99:59:59) after which the display will
return to zero.
To stop the timer, press the set/reset button briey
while TIMER is displayed.
To reset the timer to zero, press and hold the
set/reset button while TIMER is displayed.
Transmission Temperature
Press the trip/fuel button until TRANS TEMP
displays. This display shows the temperature of
the automatic transmission uid in either degrees
Fahrenheit (°F) or degrees Celsius (°C).
273

Trip Odometer
Press the trip odometer reset stem until TRIP
displays. This display shows the current distance
traveled in either miles (mi) or kilometers (km)
since the last reset for the trip odometer.
The trip odometer can be reset to zero by pressing
and holding the trip odometer reset stem while
the trip odometer is displayed.
The trip odometer has a feature called the
retro-active reset. This can be used to set the trip
odometer to the number of miles (kilometers)
driven since the ignition was last turned on. This
can be used if the trip odometer is not reset at the
beginning of the trip.
To use the retro-active reset feature, press and
hold the trip odometer reset stem for at least four
seconds. The trip odometer will display the
number of miles (mi) or kilometers (km) driven
since the ignition was last turned on and the
vehicle was moving. Once the vehicle begins
moving, the trip odometer will accumulate mileage.
For example, if the vehicle was driven 5 miles
(8 km) before it is started again, and then
the retro-active reset feature is activated, thedisplay will show 5 miles (8 km). As the vehicle
begins moving, the display will then increase
to 5.1 miles (8.2 km), 5.2 miles (8.4 km), etc.
If the retro-active reset feature is activated after
the vehicle is started, but before it begins moving,
the display will show the number of miles (mi)
or kilometers (km) that were driven during the last
ignition cycle.
Transmission Temperature
Press the trip odometer reset stem until TRANS
TEMP displays. This display shows the
temperature of the automatic transmission uid in
either degrees Fahrenheit (°F) or degrees
Celsius (°C).
Trailer Gain and Output
On vehicles with the Integrated Trailer Brake
Control (ITBC) system, the trailer brake display
appears in the DIC. Press the trip odometer reset
stem until TRAILER GAIN and OUTPUT display.
TRAILER GAIN shows the trailer gain setting. This
setting can be adjusted from 0.0 to 10.0 with
either a trailer connected or disconnected.
278

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.
The traction control system is enabled
automatically when you start your vehicle. It will
activate and the StabiliTrak
®light will ash if
it senses that any of the wheels are spinning or
beginning to lose traction while driving. If you
turn off traction control, only the brake-traction
control portion of traction control will work.
The engine speed management will be disabled.
In this mode, engine power is not reduced
automatically and the driven wheels can spin more
freely. This can cause the brake-traction control
to activate constantly.
Notice:If you allow the wheel(s) of one axle
to spin excessively while the StabiliTrak
®, ABS
and brake warning lights and the SERVICE
STABILITRAK message are displayed,
you could damage the transfer case.The repairs would not be covered by your
warranty. Reduce engine power and do
not spin the wheel(s) excessively while these
lights and this message are displayed.
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.
If your vehicle is in cruise control when the system
activates, the StabiliTrak
®light will ash and the
cruise control will automatically disengage.
When road conditions allow you to use cruise
again, you may re-engage the cruise control.
SeeCruise Control on page 220.
StabiliTrak
®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 for service.
386

Maintenance When Trailer Towing
Your vehicle will need service more often when
you’re pulling a trailer. SeeScheduled
Maintenance (Gasoline Engine) on page 627for
more information. Things that are especially
important in trailer operation are automatic
transmission uid (don’t overll), engine oil, axle
lubricant, belt, cooling system and brake system.
Each of these is covered in this manual, and
the Index will help you nd 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
Your vehicle is equipped with one of the following
wiring harnesses for towing a trailer or hauling
a slide-in camper.
Basic Trailer Wiring
All regular, extended cab and crew cab pickups
have a seven-wire trailer towing harness.
For vehicles not equipped with heavy duty
trailering, the harness is clipped to the vehicle’s
frame behind the spare tire mount. The harness
requires the installation of a trailer connector,
which is available through your dealer.
If you need to tow a light-duty trailer with a
standard four-way round pin connector, you can
also get an adapter from your dealer.
480

Service........................................................ 488
Accessories and Modications................... 488
California Proposition 65 Warning.............. 489
Doing Your Own Service Work.................. 489
Adding Equipment to the Outside of
Your Vehicle.......................................... 490
Fuel............................................................. 490
Gasoline Octane........................................ 491
Gasoline Specications.............................. 491
California Fuel........................................... 491
Additives................................................... 492
Fuel E85 (85% Ethanol)............................ 493
Fuels in Foreign Countries........................ 494
Filling the Tank......................................... 494
Filling a Portable Fuel Container............... 497
Checking Things Under the Hood.............. 498
Hood Release........................................... 498
Engine Compartment Overview.................. 500
Engine Oil (Gasoline Engine).................... 502
Engine Oil Life System.............................. 505Engine Air Cleaner/Filter
(Gasoline Engines)................................. 507
Automatic Transmission Fluid.................... 510
Engine Coolant.......................................... 514
Coolant Surge Tank Pressure Cap............ 517
Engine Overheating................................... 517
Overheated Engine Protection
Operating Mode (V8 Engines Only)........ 520
Cooling System......................................... 521
Engine Fan Noise..................................... 526
Power Steering Fluid................................. 526
Windshield Washer Fluid........................... 527
Brakes...................................................... 529
Battery...................................................... 533
Jump Starting............................................ 534
Rear Axle.................................................... 540
Four-Wheel Drive........................................ 541
Front Axle................................................... 543
Section 5 Service and Appearance Care
485

A. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter (Gasoline Engines) on page 507.
B. Air Filter Restriction Indicator (If Equipped).
SeeEngine Air Cleaner/Filter (Gasoline
Engines) on page 507.
C. Coolant Surge Tank and Pressure Cap. See
Cooling System on page 521andCoolant
Surge Tank Pressure Cap on page 517.
D. Positive (+) Terminal. SeeJump Starting on
page 534.
E. Battery. SeeBattery on page 533.
F. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil (Gasoline Engine) on
page 502.
G. Automatic Transmission Dipstick. See
“Checking the Fluid Level” underAutomatic
Transmission Fluid on page 510.H. Remote Negative (−) Terminal (Out of View).
SeeJump Starting on page 534.
I. Engine Oil Dipstick (Out of View). See
“Checking Engine Oil” underEngine Oil
(Gasoline Engine) on page 502.
J. Engine Cooling Fan. SeeCooling System on
page 521.
K. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 526.
L. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 529.
M. Underhood Fuse Block. SeeUnderhood Fuse
Block on page 615.
N. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 527.
501