2003 GMC SONOMA lock

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-3
Rear Seats
............................................... 1-9
Safety Belts
.............................................1-10
Child Restraints
.......................................1-30
Air Bag System
.......................................1-54
Restraint System Check
............................1-64
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-8
Windows
.................................................2-14
Theft-Deterrent Systems
............................2-17
Starting and Operating Your Vehicle
...........2-20
Mirrors
....................................................2-39
Storage Areas
.........................................2-41
Sunroof
..................................................2-52
Vehicle Personalization
.............................2-54
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-2
Climate Controls
......................................3-17
Warning Lights, Gages and Indicators
.........3-20
Audio System(s)
.......................................3-36
Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-42Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under the Hood
................. 5-8
Rear Axle
...............................................5-47
Four-Wheel Drive
.....................................5-48
Front Axle
...............................................5-49
Bulb Replacement
....................................5-50
Windshield Wiper Blade Replacement
.........5-56
Tires
......................................................5-58
Appearance Care
.....................................5-79
Vehicle Identification
.................................5-87
Electrical System
......................................5-88
Capacities and Specifications
.....................5-94
Normal Maintenance Replacement Parts
......5-96
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance Information.................... 7-1
Customer Assistance Information
.................. 7-2
Reporting Safety Defects
............................ 7-8
Index................................................................ 1
2003 GMC Sonoma Owner ManualM
2003 - Sonoma Owner Manual

Front Seats
Manual Seats
This section tells you about the seats – How to adjust
them, and fold them up and down.
{CAUTION:
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 don’t want to. Adjust the driver’s
seat only when the vehicle is not moving.Move the lever under the front of a manual seat up to
unlock it. Slide the seat to where you want it and release
the lever. Try to move the seat with your body to
make sure the seat is locked into place.
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2003 - Sonoma OM

Power Seats
If your vehicle has this feature, there will be a control on
the outboard side of the front seat(s).
Horizontal Control:Raise or lower the front of the seat
by raising or lowering the forward edge of the control.
Raise or lower the rear of the seat by raising or lowering
the rear edge of the control. Move the seat forward or
rearward by moving the whole control toward the front or
the rear of the vehicle.Moving the whole control up or down raises or lowers
the whole seat.
Vertical Control:Move the reclining front seatback
forward or rearward by moving the control toward
the front or rear of the vehicle.
Manual Lumbar
If your vehicle has this
feature, there will be a
knob located on the
outboard side of the
driver’s seat.
Turn the knob counterclockwise to increase lumbar
support and clockwise to decrease lumbar support.
1-4
2003 - Sonoma OM

Reclining Seatbacks
To adjust a manual
seatback, lift the lever
on the outboard side
of the seat.
Release the lever to lock the seatback where you want
it. To return the seat to an upright position, pull up
on the lever without pushing on the seatback.
If your vehicle is equipped with the vertical power seat
control described inPower Seats on page 1-4,
pressing it rearward allows the seatback to recline.But don’t have a seatback reclined if your vehicle is
moving.
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2003 - Sonoma OM

Seatback Latches
The front seatback folds forward to let people get into
the rear seat or to access the storage area behind
the seat.
To fold the front seatback
forward, push the lever
on the side of the
seat rearward and pull the
seatback forward.To return the seatback to the upright position, push the
seatback all the way back until the latch catches. If
the seatback was reclined before being folded forward,
it will return to the reclined position.
{CAUTION:
If the seatback isn’t locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there. Always
press rearward on the seatback to be sure it is
locked.
1-8
2003 - Sonoma OM

Rear Seats
Rear Seat Operation
The rear seatback can be tilted forward to let you reach
the area behind it.
To tilt the seatback
forward, lift up on the lever
located at the base of
the seatback on the
driver’s or passenger’s
side. Then tilt the
seatback forward.
To return the seatback to the upright position, push the
seatback rearward until it latches. After returning the
seatback to its upright position, try to pull the seatback
forward to make sure it is locked.
{CAUTION:
If the seatback isn’t locked, it could move
forward in a sudden stop or crash. That could
cause injury to the person sitting there.
Always press rearward on the seatback to be
sure it is locked.
{CAUTION:
A safety belt that is improperly routed, not
properly attached, or twisted won’t provide the
protection needed in a crash. The person
wearing the belt could be seriously injured.
After raising the rear seatback, always check
to be sure that the safety belts are properly
routed and attached, and are not twisted.
1-9
2003 - Sonoma OM

Driver Position
This part describes the driver’s restraint system.
Lap-Shoulder Belt
The driver has a lap-shoulder belt. Here’s how to wear
it properly.
1. Close and lock the door.
2. Adjust the seat so you can sit up straight. To see
how, see“Seats”in the Index.3. Pick up the latch plate and pull the belt across you.
Don’t let it get twisted.
The shoulder belt may lock if you pull the belt
across you very quickly. If this happens, let the belt
go back slightly to unlock it. Then pull the belt
across you more slowly.
4. Push the latch plate into the buckle until it clicks.
Pull up on the latch plate to make sure it is secure.
If the belt isn’t long enough, seeSafety Belt
Extender on page 1-29.
Make sure the release button on the buckle is
positioned so you would be able to unbuckle the
safety belt quickly if you ever had to.
1-16
2003 - Sonoma OM

5. To make the lap part tight, pull down on the buckle
end of the belt as you pull up on the shoulder belt.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’d be less likely
to slide under the lap belt. If you slid under it, the belt
would apply force at 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 safety belt locks if there’s a sudden stop or crash,
or if you pull the belt very quickly out of the retractor.
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2003 - Sonoma OM