2004 GMC CANYON ECU

If your vehicle has a roof-mounted side impact air bag
for the right front passenger and the person seated
directly behind that passenger, it is located in the ceiling
above the side windows.
{CAUTION:
If something is between an occupant and an
air bag, the bag might not inate properly or it
might force the object into that person causing
severe injury or even death. The path of an
inating air bag must be kept clear. Do not put
anything between an occupant and an air bag,
and do not attach or put anything on the
steering wheel hub or on or near any other air
bag covering. If your vehicle has side impact
air bags, never secure anything to the roof of
your vehicle by routing the rope or tiedown
through any door or window opening. If you
do, the path of an inating side impact air bag
will be blocked. The path of an inating air bag
must be kept clear.
1-65

{CAUTION:
If the air bag readiness light ever comes on
when you have turned off the air bag, it means
that something may be wrong with the air bag
system. The right front passenger’s frontal air
bag could inate even though the switch is off.
If this ever happens, do not let anyone whom
the national government has identied as a
member of a passenger air bag risk group
sit in the right front passenger’s position
(for example, do not secure a rear-facing child
restraint in the right front passenger’s seat)
until you have your vehicle serviced.
To turn the right front
passenger’s frontal air bag
on again, insert your
ignition key into the switch,
push in, and move the
switch to the auto position.
Servicing Your Air Bag-Equipped
Vehicle
Air bags affect how your vehicle should be serviced.
There are parts of the air bag systems in several places
around your vehicle. Your dealer and the service
manual have information about servicing your vehicle
and the air bag systems.To purchase a service manual,
seeService Publications Ordering Information on
page 7-11.
{CAUTION:
For up to 10 seconds after the ignition key is
turned off and the battery is disconnected, an
air bag can still inate during improper service.
You can be injured if you are close to an air bag
when it inates. Avoid wires wrapped with
yellow tape or yellow connectors. They are
probably part of the air bag system. Be sure to
follow proper service procedures, and make
sure the person performing work for you is
qualied to do so.
The air bag systems do not need regular maintenance.
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Adding Equipment to Your
Air Bag-Equipped Vehicle
Q:Is there anything I might add to the front of
the vehicle that could keep the air bags from
working properly?
A:Yes. If you add things that change your vehicle’s
frame, bumper system, front end sheet metal or
height, they may keep the air bag system from
working properly. Also, the air bag system may not
work properly if you relocate any of the air bag
sensors. If you have any questions about this,
you should contact Customer Assistance before
you modify your vehicle. The phone numbers
and addresses for Customer Assistance are in
Step Two of theCustomer Satisfaction Procedure
on page 7-2.
Restraint System Check
Checking Your Restraint Systems
Now and then, make sure the safety belt reminder light
and all your belts, buckles, latch plates, retractors
and anchorages are working properly. Look for any other
loose or damaged safety belt system parts. If you see
anything that might keep a safety belt system from doing
its job, have it repaired.
Torn or frayed safety belts may not protect you in a
crash. They can rip apart under impact forces. If a belt
is torn or frayed, get a new one right away.
Also look for any opened or broken air bag covers, and
have them repaired or replaced. (The air bag system
does not need regular maintenance.)
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Keys...............................................................2-2
Remote Keyless Entry System.........................2-4
Remote Keyless Entry System Operation...........2-5
Doors and Locks.............................................2-7
Door Locks....................................................2-7
Power Door Locks..........................................2-8
Programmable Automatic Door Locks................2-8
Rear Door Security Locks (Crew Cab)...............2-9
Lockout Protection..........................................2-9
Leaving Your Vehicle....................................2-10
Rear Doors (Extended Cab)...........................2-10
Tailgate.......................................................2-10
Windows........................................................2-12
Manual Windows..........................................2-12
Power Windows............................................2-13
Sliding Rear Window.....................................2-14
Sun Visors...................................................2-14
Theft-Deterrent Systems..................................2-14
Content Theft-Deterrent.................................2-14
Passlock
®....................................................2-16
Starting and Operating Your Vehicle................2-16
New Vehicle Break-In....................................2-16
Ignition Positions..........................................2-17
Starting Your Engine.....................................2-18
Engine Coolant Heater..................................2-20
Automatic Transmission Operation...................2-21
Manual Transmission Operation......................2-24Four-Wheel Drive..........................................2-26
Parking Brake..............................................2-29
Shifting Into Park (P)
(Automatic Transmission)............................2-30
Shifting Out of Park (P)
(Automatic Transmission)............................2-32
Parking Your Vehicle (Manual Transmission).......2-33
Parking Over Things That Burn.......................2-33
Engine Exhaust............................................2-34
Running Your Engine While You Are Parked.......2-34
Mirrors...........................................................2-36
Manual Rearview Mirror.................................2-36
Manual Rearview Mirror with OnStar
®..............2-36
Automatic Dimming Rearview Mirror with
Compass and Temperature Display..............2-37
Outside Manual Mirrors..................................2-39
Outside Power Mirrors...................................2-40
Outside Convex Mirror...................................2-40
OnStar
®System.............................................2-41
Storage Areas................................................2-42
Glove Box...................................................2-42
Cupholder(s)................................................2-42
Front Armrest Storage Area...........................2-43
Assist Handles.............................................2-43
Rear Storage Area........................................2-43
Bed Rails....................................................2-43
Section 2 Features and Controls
2-1

Rear Door Security Locks
(Crew Cab)
If you have the crew cab model, your vehicle may be
equipped with rear door security locks. With this feature,
you can lock the rear doors so they cannot be opened
from the inside by passengers.
The security lock lever is
located on the inside edge
of each rear door.To use the security locks, do the following:
1. Open one of the rear doors.
2. Using your ignition key, turn the lock clockwise on
the driver’s side rear door, and counterclockwise on
the passenger’s side rear door to engage the
rear door security lock.
3. Close the door.
4. Repeat these steps on the opposite rear door.
If you want to open the rear door when the security lock is
on, unlock the door and open the door from the outside.
To return the rear doors to normal use, disengage the
locks by inserting the ignition key and turning the lock
counterclockwise for the driver’s side rear door, and
clockwise for the passenger’s side rear door.
Lockout Protection
If you have power door locks, this feature protects you
from locking your key in the vehicle when the key is
in the ignition and a door is open.
If the power door lock switch is pressed when a door is
open and the key is in the ignition, all of the doors will
lock and then the driver’s door will unlock.
2-9

Leaving Your Vehicle
If you are leaving the vehicle, take your keys, open your
door and set the locks from inside. Then get out and
close the door.
Rear Doors (Extended Cab)
If you have an extended cab, your vehicle has rear
doors for convenience in loading and unloading cargo.
To open a rear door, open the front door. Then, use
the handle located on the front edge of the rear
door panel to open it. You must close the rear door
before closing the front door.
Tailgate
You can open the tailgate by pulling up on the handle
while pulling the tailgate down.
When you put the tailgate back up, be sure it latches
securely.
You can lock the tailgate using your ignition key.
Turn the key counterclockwise to lock the tailgate.
Turn the key clockwise to unlock the tailgate.
2-10

Removing the Tailgate
Follow these steps if you want to remove the tailgate:
1. Raise the tailgate
slightly.
2. Remove the retaining cables from both ends of the
tailgate by pulling upward on the clip. Then, push
forward so the larger part of the hole on the bracket
is over the bolt. Pull the end over the bolt.
3. With the tailgate halfway down, pull the tailgate
toward you at the passenger’s side and then
move the tailgate to the right to release the
passenger’s side.
Reverse the procedure to reinstall the tailgate. Make
sure it is secure.To partially lower the tailgate do the following:
1. Raise the tailgate
slightly.
2. Pull upward on each clip. Then, push forward so
the larger part of the hole on the bracket is over
the bolt. Pull the end over the bolt.
3. Slide the end tting off the bottom bolt and onto
the top bolt.
If you would like to close the tailgate, the bracket cannot
be in the partially open position and must be anchored
on the bottom bolt, using the secondary position on
the end tting. Tailgate Fully Down
Tailgate Partially Down
2-11

Sliding Rear Window
If your vehicle has this feature, squeeze the latch in the
center of the window and slide the glass to open it.
When you close the window, be sure the latch is engaged.
Sun Visors
To block glare, pull the visor down. It can also be
detached from the center mount and moved to the side
to block glare from that direction.
Visor Vanity Mirror
The passenger’s side sun visor has a mirror on it.
Pull down the visor to access the mirror.
Theft-Deterrent Systems
Vehicle theft is big business, especially in some cities.
Although your vehicle has a number of theft-deterrent
features, we know that nothing we put on it can make it
impossible to steal. However, there are ways you
can help.
Content Theft-Deterrent
If your vehicle has the
remote keyless entry
system, the vehicle has
a content theft-deterrent
alarm system.
To activate the content theft-deterrent system,
do the following:
1. Close all the doors.
2. Lock the door with the remote keyless entry
transmitter. The security light ashes.
If the vehicle is equipped with OnStar
®, and OnStar®
locks the doors, with all the doors closed, it will activate
the system.
2-14