Page 1 of 554

Seats and Restraint Systems........................... 1-1
Front Seats
............................................... 1-3
Rear Seats
............................................... 1-8
Safety Belts
.............................................1-23
Child Restraints
.......................................1-45
Air Bag Systems
......................................1-72
Restraint System Check
............................1-87
Features and Controls..................................... 2-1
Keys
........................................................ 2-3
Doors and Locks
....................................... 2-8
Windows
.................................................2-15
Theft-Deterrent Systems
............................2-18
Starting and Operating Your Vehicle
...........2-20
Mirrors
....................................................2-43
OnStar
®System
......................................2-53
HomeLink®Transmitter
.............................2-55
Storage Areas
.........................................2-60
Sunroof
..................................................2-63
Vehicle Personalization
.............................2-64
Instrument Panel............................................. 3-1
Instrument Panel Overview
.......................... 3-4
Climate Controls
......................................3-22
Warning Lights, Gages and Indicators
.........3-40
Driver Information Center (DIC)
..................3-58
Audio System(s)
.......................................3-77Driving Your Vehicle....................................... 4-1
Your Driving, the Road, and Your Vehicle
..... 4-2
Towing
...................................................4-53
Service and Appearance Care.......................... 5-1
Service
..................................................... 5-3
Fuel
......................................................... 5-4
Checking Things Under the Hood
.................5-10
All-Wheel Drive
........................................5-51
Rear Axle
...............................................5-52
Four-Wheel Drive
.....................................5-53
Front Axle
...............................................5-54
Bulb Replacement
....................................5-55
Windshield Wiper Blade Replacement
.........5-62
Tires
......................................................5-63
Appearance Care
...................................5-103
Vehicle Identi cation
...............................5-112
Electrical System
....................................5-113
Capacities and Speci cations
...................5-122
Maintenance Schedule..................................... 6-1
Maintenance Schedule
................................ 6-2
Customer Assistance and Information.............. 7-1
Customer Assistance and Information
........... 7-2
Reporting Safety Defects
...........................7-11
Index................................................................ 1
2004 GMC Yukon/Yukon XL Owner ManualM
Page 9 of 554
Front Seats
Manual Seats
{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.
If your vehicle has a manual bucket or a split bench
seat, you can adjust it with this lever located at the front
of the seat.
Lift the lever to unlock the seat. Using your body, 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.
1-3
Page 12 of 554
Reclining Seatbacks
To adjust the front seatback, lift the manual lever
located on the outboard side of the seat. Release the
lever to lock the seatback where you want it. Lift
the lever again without pushing on the seatback and the
seatback will go to an upright position.
If your vehicle has power seats with a power recliner,
seePower Seats on page 1-4for further information on
how to operate the reclining seatback feature.But don’t have a seatback reclined if your vehicle is
moving.
1-6
Page 14 of 554

Rear Seats
Rear Seat Operation
Entering or Exiting the Third Row Seats
{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.
Extended models:The passenger’s side of the second
row 60/40 or rear bucket seats has an easy entry
feature. This makes it easy to get in and out of the third
seat, if your vehicle has one.
To operate the easy entry seat turn the release lever,
located on the back of the seat upward.Tilt the seatback toward the front of the vehicle by
pulling the top of the seat forward. When you do the seat
bottom will release. Pull the seat forward until it stops.
Be sure to return the seat to the passenger position
when nished. Push and pull on the seat to make sure
it is locked in place.
60/40 Split Bench Seat
Yukon models:The rear seat may have a 60/40 split
seat which may be folded down to give you more
cargo space.
Extended models:The second row rear seat of
extended models may have a 60/40 split seat. Either
side of the rear seat my be folded down to provide more
cargo space.
1-8
Page 15 of 554

Folding the Seatbacks
{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.
Make sure that nothing is under or in front of the seat
and that the head restraints are completely lowered.
On Yukon models the rear seatbacks may be equipped
with rearward folding head restraints. When the
seatback is being folded down, the head restraint will
automatically fold rearward to allow a at load oor
for cargo or entry to the third row seat (if equipped).To fold, pull up on the
strap loop at the rear of
the seat cushion.
Then, pull the seat cushion
up and fold it forward.
After folding the seat cushion fully forward, pull the
seatback forward and fold the seatback down until it is
at. If the seatback cannot fold at because it
interferes with the cushion, try moving the seat forward
and/or bring the front seatback more upright. On the
passenger side of the extended models, the lever at the
base of the seat must be turned rearward to release
the seatback.
1-9
Page 17 of 554
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 vehicles.
Folding the Seatbacks
{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.To fold the seatbacks do the following:
Pull up on the release lever, labeled 1, located on
the rear of the seatback, and push the seatback
forward.
To return the seat to the passenger position, pull up
on the release lever labeled 1 and then pull up on
the seatback until the seatback locks into the upright
position.
Push forward on the seatback to make sure it is locked
into position.
1-11
Page 18 of 554

Tilting the 50/50 Split Bench Seat
{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:
If the support rod isn’t properly engaged, the
folded third row seat could come loose in a
sudden stop or crash. That could cause injury
to people and damage to your vehicle. Always
be sure the support rod is properly engaged
when the third row seat is folded forward.Once the third seatback has been folded down, the
entire seat can be tilted forward to create a at
load oor. To do this, do the following:
1. Enter the rear cargo area of the vehicle.
2. Make sure the head restraints have been lowered
completely.
3. With the seat folded, unlatch the seat from the oor
by pulling up on the lever located under the
carrying handle at the rear of the seat labeled 2.
4. Lift the rear of the seat up, off the oor. You will not
be able to unlatch the seat from the oor unless the
seatback is folded down.
5. Tilt the seat fully forward and secure it in place
using the support rod located on the underside
of the seat on the passenger’s side. Make sure the
rod pin is fully engaged in the lock.
6. Push and pull on the seat. Make sure the support
rod is holding it rmly in place. Use the seat in this
position only when necessary for additional
cargo space.
1-12
Page 19 of 554
To return the seat to the seating position do the following:
1. Push forward on the seat and release the support
lock rod.
2. Secure the support rod in its stored position on the
underside of the seat.
3. Lower the seat to the oor and let the seat drop
into place.
4. Lift up on the carrying handle to make sure the seat
is locked in place.
5. Return the seatback to the upright position by
pulling up on the release lever labeled 1 before
the back can be folded upright.
6. Pull the seatback forward to make sure it is locked
in place.Removing the 50/50 Split Bench Seat
To remove the 50/50 split bench seat, do the following:
1. Open the rear doors and enter the rear of the
vehicle.
2. Fold the seatback
forward onto the seat
cushion by using
the lever labeled 1.
The seat cannot
be removed unless the
seatback is folded.
1-13