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