2003 GMC YUKON DENALI ECU

These are some examples of vehicle symbols you may find on your vehicle:
CAUTION
POSSIBLE
INJURY
PROTECT EYES BY
SHIELDING
CAUSTIC
BATTERY
ACID COULD CAUSE
BURNS
AVO ID
SPARKS
OR
FLAMES
SPARK
OR
FLAME '\I/'
COULD
EXPLODE BATTERY LATCH BOTH LAP AND
SHOULDER BELTS TO
PROTECT OCCUPANT
4
DO NOT TWIST SAFETY
BELT WHEN ATTACHING
FASTEN SEAT
BELTS
MOVE SEAT DO NOT INSTALL
A REAR-FACING
CHILD RESTRAINT
SECURE IN THIS SEATING
CHILD SEAT POSITION
FULLY
c REARWARD+ /3
PULL BELT DO NOT INSTALL A
COMPLETELY
THEN SECURE
CHILD SEAT FORWARD-FACING
CHILD RESTRAINT IN THIS SEATING
POSITION
POWER DOOR LOCK
WINDOW UNLOCK LIGHTING
- MASTER SWITCH u- 0 ,
LAMPS #O
ENGINE
COOLANT
-FA TEMP -
CHARGING Fl
BATTERY
SYSTEM
ENGINE OIL PRESSURE
9%77
ANTI-LOCK (@)
BRAKES
FUSE BOX
ACCESS
ENGINE
COOLANT FAN
OWNER'S MANUAL
SERVICE
SERVICE MANUAL
V

1 Seats and Restraint Systems
Front Seats ...................................................... 1.3
Power Seats
...... ..................................... 1-3
Power Lumbar
............................................... 1-4
Heated Seats
................................................. 1.4
Reclining Seatbacks
........................................ 1.5
Head Restraints
............................................. 1-6
Rear Seats .................................................. .l -7
Rear Seat Operation .. ...... 1-7
Heated Seats
................................................. 1-8
60/40 Split Bench Seat
................................... 1-9
50/50 Split Bench Seat .................................. 1-1 1
Bench Seat
.............................................. 1.1 7
Bucket Seats ........................................... 1-22
Safety Belts ................................................... 1-25
Safety Belts: They Are for Everyone
................ 1-25
Questions and Answers About Safety Belts
...... 1.29
How
to Wear Safety Belts Properly ................. 1-30
Driver Position
.............................................. 1.30
Safety Belt Use During Pregnancy
.................. 1-38
Right Front Passenger Position
.. ., .... .... 1-39
Center Passenger Position
...... , 1 -39 Rear
Seat Passengers
.................................. 1-41
Rear Safety Belt Comfort Guides for Children and Small Adults
....................................... 1-44
Safety Belt Extender
..................................... 1-47
Child Restraints ............................................. 1-48
Older Children
.............................................. 1.48
Infants and Young Children
....... .......... 1.50
Child Restraint Systems ........ ...... 1-54
Where
to Put the Restraint ............................. 1-56
Top Strap
.................................................... 1.57
Top Strap Anchor Location
............................. 1-59
Lower Anchorages and Top Tethers for
Children (LATCH System)
........................... 1.61
Securing a Child Restraint Designed for the
LATCH System
......................................... 1-63
Securing a Child Restraint in a Rear Outside
Seat Position
............................................ 1-63
Securing
a Child Restraint in a Center Rear
Seat Position
............................................ 1.65
Securing a Child Restraint in the Right Front
Seat Position
......................... .I -68
1-1

Returning the Seats to an Upright
P--;tion
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.
I I
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.
To return the seat to the upright position, do the
following:
1. On Yukon XL Denali models, lift the load floor
panels and latch them into the seatback.
2. Lift the seatback up and push it rearward
all the way.
3. Lower the seat cushion until it latches into position.
4. Pull forward on the seatback and up on
the seat cushion to make sure the seat is
securely in place.
5. On Yukon Denali models, return the head restraints
to the upright position.
6. Check to see that the safety belt buckles on the
driver’s side seat are accessible to the outboard
and center occupants and are not under the
seat cushions.
50/50 Split Bench Seat
If your vehicle has a 50/50 split bench, the seatback(s)
can be folded and the entire seat(s) tilted or removed
from the vehicle.
1-1 1

2. Once the latches are
engaged, let the seat
drop into place. Release the lever
labeled
1 and pull the
seatback up using
the assist strap on the outboard side of the
seat
to return it to
its upright position.
3. Push and pull on the seat to make sure it is locked
into place. The seatback cannot be raised to the
upright position unless the seat is secured to
the floor.
Bench Seat
If your vehicle has a full bench, the seatback can be
folded and the seat can be tilted or removed from
the vehicle.
Folding the Seatback
1
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.
To fold the seatback on the bench seat, do the following:
1-17

Replacing the Bench Seat
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.
A seat that isn’t locked into place properly can
move around in a collision or sudden stop.
People in the vehicle could be injured. Be sure
to lock the seat into place properly when installing
it.
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.
To replace the bench seat, do the following:
1. While holding the rear of the seat up, slide the front
wheels into the slots on the floor. The front latches
should lock into place. If the latches
do not lock,
try tilting the rear of the seat upwards.
2. Once the latches are engaged, let the seat drop
into place. Release the lever labeled
1 to return
the seatback to its upright position.
3. Push and pull on the seat to make sure it is locked
into place. The seatback cannot be raised to the
upright position unless the seat is secured to
the floor.
1-21

Once the seatbacks are folded down, on
Yukon
XL Denali models only, the rear seat footwell
area will be exposed and will have to be covered by the
load floor panel.
To create a load floor, do the
following:
Returning the Seatbacks to an Upright
Position
1. Release the panels from the seatbacks by pushing
2. Then fold the panels back to cover the rear seat
forward on the latches.
footwell area.
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.
To return the seatbacks to the upright position, do the
following:
1. On Yukon
XL Denali models, lift the load floor
panels and latch them into the seatback.
2. Lift the seatback up and push it rearward all the
way. On Yukon
XL Denali models, move the
headrest to the seatback.
3. Lower the seat cushion until it latches into position.
4. On Yukon Denali models, return the headrests
5. Pull forward on the seatback and up on the seat
to
the upright position.
cushion to make sure the seat
is securely in place.
1-24

Lap-Shoulder Belt
The driver has a lap-shoulder belt. Here’s how to wear it
properly.
1. Close and lock the door. 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, see Safety Belt
Extender on page 1-47.
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.
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.
1-31

Lap-Shoulder Belt
Here’s how to wear a lap-shoulder belt properly.
1. Pick up the latch plate and pull the belt across you.
Don’t let it get twisted.
2. Push the latch plate into the buckle until it clicks.
Pull up on the latch plate
to make sure it is secure. When
the shoulder belt is pulled out all the way,
it will lock. If it does, let it go back all the way and
start again.
If the belt is not long enough, see Safety Belt
Extender on page
1-47.
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.
1-42