GMC 2010 T-Series User manual

2010 GMC T-Series Owner Manual M
Seats and Restraint System ...................... 1-1
Front Seats ....................................... 1-2
Safety Belts ...................................... 1-7
Child Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Restraint System Check . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
Features and Controls ............................ 2-1
Keys ............................................. 2-2
Doors and Locks ................................. 2-3
Windows ......................................... 2-4
Starting and Operating Your Vehicle . . . . . . . . . . . . . . 2-7
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Storage Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Instrument Panel Overview . . . . . . . . . . . . . . . . . . . . . . . 3-4
Climate Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Warning Lights, Gages, and Indicators . . . . . . . . . . 3-20
Audio System(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Driving Your Vehicle .............................. 4-1
Your Driving, the Road, and the Vehicle . . . . . . . . . . 4-2
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Service and Appearance Care . . . . . . . . . . . . . . . . . . . 5-1
Service ........................................... 5-3
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Checking Things Under the Hood . . . . . . . . . . . . . . . 5-16
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-46
Cab Tilting ...................................... 5-47
Noise Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-54
Bulb Replacement .............................. 5-55
Windshield Wiper Blade Replacement . . . . . . . . . . . 5-55
Other Service Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-56
Tires ............................................ 5-59
Appearance Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-69
Vehicle Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-76
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-76
Capacities and Specifications . . . . . . . . . . . . . . . . . . . 5-85
Normal Maintenance Replacement Parts . . . . . . . . 5-88
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Customer Assistance Information ............... 7-1
Customer Assistance and Information . . . . . . . . . . . . 7-2
Reporting Safety Defects . . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Vehicle Data Recording and Privacy . . . . . . . . . . . . . 7-11
Index .................................... i-1

GENERAL MOTORS, GM, the GM Emblem, GMC, and
the GMC Truck Emblem are registered trademarks of
General Motors Corporation.
This manual describes features that may or may
not be on your specific vehicle either because they
are options that you did not purchase or due to changes
subsequent to the printing of this owner manual. Please
refer to the purchase documentation relating to your
specific vehicle to confirm each of the features found
on your vehicle. For vehicles first sold in Canada,
substitute the name “General Motors of Canada
Limited”for GMC wherever it appears in this manual.
Keep this manual in the vehicle for quick reference.
Canadian Owners
Propriétaires Canadiens
A French language copy of this manual can be obtained
from your dealer/retailer or from:
On peut obtenir un exemplaire de ce guide en français
auprès du concessionnaire ou à l'adresse suivante:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
1-800-551-4123
Numéro de poste 6438 de langue française
www.helminc.com
Index
To quickly locate information about the vehicle, use the
index in the back of the manual. It is an alphabetical list
of what is in the manual and the page number where it
can be found.
ii
Litho in the U.S.A.
Part No. 25901007 A First Printing ©2009 General Motors Corporation. All rights Reserved.

Safety Warnings and Symbols
Warning Messages found on vehicle labels and in this
manual describe hazards and what to do to avoid or
reduce them.
Danger indicates a hazard with a high level of risk
which will result in serious injury or death.
Warning or Caution indicates a hazard that could result
in injury or death.
{WARNING:
These mean there is something that could hurt
you or other people.
Notice: This means there is something that could
result in property or vehicle damage. This would not
be covered by the vehicle's warranty.
A circle with a slash
through it is a safety
symbol which means
“Do Not,” “Do not do this,”
or “Do not let this
happen.”
Vehicle Symbols
The vehicle has components and labels that use
symbols instead of text. Symbols are shown along with
the text describing the operation or information relating
to a specific component, control, message, gage,
or indicator.
M:This symbol is shown when you need to see your
owner manual for additional instructions or information.
*:This symbol is shown when you need to see a
service manual for additional instructions or information.
iii

Vehicle Symbol Chart
Here are some additional symbols that may be found on
the vehicle and what they mean. For more information
on the symbol, refer to the index.
9:Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
g:Audio Steering Wheel Controls or OnStar
®
$:Brake System Warning Light
":Charging System
I:Cruise Control
B:Engine Coolant Temperature
O:Exterior Lamps
#:Fog Lamps
.:Fuel Gage
+:Fuses
i:Headlamp High/Low-Beam Changer
j:LATCH System Child Restraints
*:Malfunction Indicator Lamp
::Oil Pressure
g:Outside Power Foldaway Mirrors
}:Power
/:Remote Vehicle Start
>:Safety Belt Reminders
7:Tire Pressure Monitor
F:Traction Control
M:Windshield Washer Fluid
iv

Section 1 Seats and Restraint System
Front Seats ......................................... 1-2
Manual Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Manual Lumbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Air Suspension Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Center Seat ..................................... 1-6
Safety Belts ........................................ 1-7
Safety Belts: They Are for Everyone . . . . . . . . . . . . 1-7
How to Wear Safety Belts Properly . . . . . . . . . . . . 1-12
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Safety Belt Use During Pregnancy . . . . . . . . . . . . . 1-23
Lap Belt ....................................... 1-24
Safety Belt Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Child Restraints .................................. 1-25
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Infants and Young Children . . . . . . . . . . . . . . . . . . . . 1-28
Child Restraint Systems . . . . . . . . . . . . . . . . . . . . . . . 1-31
Lower Anchors and Tethers for Children
(LATCH) ..................................... 1-33
Securing a Child Restraint in Your Medium Duty
Vehicle ...................................... 1-34
Restraint System Check ......................... 1-36
Checking the Restraint Systems . . . . . . . . . . . . . . . 1-36
Replacing Restraint System Parts After a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
1-1

Front Seats
Manual Seats
Your vehicle has bucket seats. You can adjust the
driver's seat with these levers located at the front of
the seat.
{WARNING:
You can lose control of the vehicle if you try to
adjust a manual driver's seat while the vehicle is
moving. The sudden movement could startle and
confuse you, or make you push a pedal when you
do not want to. Adjust the driver's seat only when
the vehicle is not moving.
Slide lever (A) to the left to unlock the seat and slide the
seat to where you want it. Release the lever and try to
move the seat with your body to make sure the seat is
locked into place.
To adjust the lower seat cushion forward or backward,
pull up on lever (B) and slide the cushion to where you
want it. Then release the lever.
1-2

Manual Lumbar To get more support in the lumbar area of your back,
turn the lumbar adjustment knob. The knob is located
on the inboard side of the driver's seatback and the
outboard side of the passenger's seatback.
1-3

Reclining Seatbacks
{WARNING:
You can lose control of the vehicle if you try to
adjust a manual driver's seat while the vehicle is
moving. The sudden movement could startle and
confuse you, or make you push a pedal when you
do not want to. Adjust the driver's seat only when
the vehicle is not moving.
To tilt the seatback, turn the reclining knob. The knob is
located on the outboard side of both seats.
1-4

{WARNING:
Sitting in a reclined position when your vehicle is
in motion can be dangerous. Even if you buckle
up, your safety belts cannot do their job when you
are reclined like this.
The shoulder belt cannot do its job. In a crash,
you could go into it, receiving neck or other
injuries.
The lap belt cannot do its job either. In a crash the
belt could go up over your abdomen. The belt
forces would be there, not at your pelvic bones.
This could cause serious internal injuries.
For proper protection when the vehicle is in
motion, have the seatback upright. Then sit well
back in the seat and wear your safety belt
properly.
Do not have a seatback reclined if the vehicle is
moving.
Air Suspension Seats
Your vehicle may have an air suspension seat.
There are two ways you can adjust the seat.
Height Adjustment
The height adjustment
is controlled by the air
suspension valve. The
lever for the valve is
located on the outboard
side of the driver's seat.
Pull the lever up to raise the seat. Push the lever down
to lower the seat.
1-5

Isolator Lock Lever
Lever shown in the Locked
Position
The lever is located on
the inboard side of the
driver's seat.
Move the handle down to lock the seat in place. This is
used to reduce backslap experienced while in tractor/
trailer operation or while operating a dump truck.
Center Seat
Your vehicle may have a center seat.
To fold the seatback down, pull the lever, located on the
right side of the seat.
Then lower the seatback forward and push down firmly
to lock in position. A storage compartment is located on
the rear of the seatback for use when the seatback is in
the fully lowered position.
Push the lever on the right side of the seat and pull on
the seatback when you are ready to raise it.
{WARNING:
If either seatback is not locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
push and pull on the seatbacks to be sure they
are locked.
1-6

Safety Belts
Safety Belts: They Are for Everyone
This part of the manual tells you how to use safety belts
properly. It also tells you some things you should not do
with safety belts.
{WARNING:
Do not let anyone ride where a safety belt cannot
be worn properly. In a crash, if you or your
passenger(s) are not wearing safety belts, the
injuries can be much worse. You can hit things
inside the vehicle harder or be ejected from the
vehicle. You and your passenger(s) can be
seriously injured or killed. In the same crash, you
might not be, if you are buckled up. Always fasten
your safety belt, and check that your passenger(s)
are restrained properly too.
{WARNING:
It is extremely dangerous to ride in a cargo area,
inside or outside of a vehicle. In a collision,
people riding in these areas are more likely to
be seriously injured or killed. Do not allow people
to ride in any area of your vehicle that is not
equipped with seats and safety belts. Be sure
everyone in your vehicle is in a seat and using a
safety belt properly.
Your vehicle has indicators as a reminder to buckle your
safety belts. See Safety Belt Reminders on page 3‑23.
1-7

In most states and in all Canadian provinces, the law
requires wearing safety belts. Here is why:
You never know if you will be in a crash. If you do have
a crash, you do not know if it will be a serious one.
A few crashes are mild, and some crashes can be so
serious that even buckled up, a person would not
survive. But most crashes are in between. In many of
them, people who buckle up can survive and sometimes
walk away. Without belts they could have been badly
hurt or killed.
After more than 40 years of safety belts in vehicles,
the facts are clear. In most crashes buckling up does
matter ... a lot!
Why Safety Belts Work
When you ride in or on anything, you go as fast as
it goes.
Take the simplest vehicle. Suppose it is just a seat on
wheels.
1-8

Put someone on it. Get it up to speed. Then stop the vehicle. The rider
does not stop.
1-9

The person keeps going until stopped by something.
In a real vehicle, it could be the windshield...
or the instrument panel...
1-10

or the safety belts!
With safety belts, you slow down as the vehicle does.
You get more time to stop. You stop over more distance,
and your strongest bones take the forces. That is why
safety belts make such good sense.
Questions and Answers About Safety
Belts
Q: Will I be trapped in the vehicle after a crash if I
am wearing a safety belt?
A: You could be —whether you are wearing a safety
belt or not. But you can unbuckle a safety belt, even
if you are upside down. And your chance of being
conscious during and after an accident, so you can
unbuckle and get out, is much greater if you are
belted.
1-11

Q: If I am a good driver, and I never drive far from
home, why should I wear safety belts?
A: You may be an excellent driver, but if you are in a
crash —even one that is not your fault —you and
your passenger(s) can be hurt. Being a good driver
does not protect you from things beyond your
control, such as bad drivers.
Most accidents occur within 25 miles (40 km)
of home. And the greatest number of serious
injuries and deaths occur at speeds of less than
40 mph (65 km/h).
Safety belts are for everyone.
How to Wear Safety Belts Properly
This section is only for people of adult size.
Be aware that there are special things to know about
safety belts and children. And there are different rules
for smaller children and infants. If a child will be riding in
the vehicle, see Older Children
on page 1‑25 or Infants
and Young Children
on page 1‑28 . Follow those rules
for everyone's protection.
It is very important for all occupants to buckle up.
Statistics show that unbelted people are hurt more often
in crashes than those who are wearing safety belts.
Occupants who are not buckled up can be thrown out of
the vehicle in a crash. And they can strike others in the
vehicle who are wearing safety belts.
First, before you or your passenger(s) wear a safety
belt, there is important information you should know.
1-12

Sit up straight and always keep your feet on the floor in
front of you. The lap part of the belt should be worn low
and snug on the hips, just touching the thighs. In a
crash, this applies force to the strong pelvic bones and
you would be less likely to slide under the lap belt.
If you slid under it, the belt would apply force on your
abdomen. This could cause serious or even fatal
injuries. The shoulder belt should go over the shoulder
and across the chest. These parts of the body are best
able to take belt restraining forces.
The shoulder belt locks if there is a sudden stop or
crash.
1-13

Q: What is wrong with this?
A: The shoulder belt is too loose. It will not give as
much protection this way.
{WARNING:
You can be seriously hurt if your shoulder belt is
too loose. In a crash, you would move forward too
much, which could increase injury. The shoulder
belt should fit snugly against your body.
1-14

Q: What is wrong with this?
A: The lap belt is too loose. It will not give nearly as
much protection this way.
{WARNING:
You can be seriously hurt if your lap belt is too
loose. In a crash, you could slide under the lap
belt and apply force on your abdomen. This could
cause serious or even fatal injuries. The lap belt
should be worn low and snug on the hips, just
touching the thighs.
1-15

Q: What is wrong with this?
A: The belt is buckled in the wrong buckle.
{WARNING:
You can be seriously injured if your belt is buckled
in the wrong place like this. In a crash, the belt
would go up over your abdomen. The belt forces
would be there, not on the pelvic bones. This
could cause serious internal injuries. Always
buckle your belt into the buckle nearest you.
1-16