2009 GMC YUKON HYBRID service

Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly tighten wheel nuts in
the proper sequence to torque specifications in
“Capacities and Specifications” in the owner manual.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer/retailer if the brake pedal does not
return to normal height, or if there is a rapid increase in
pedal travel. This could be a sign that brake service
might be required.
Brake Adjustment
Every time the brakes are applied, the disc brakes
adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together
if the vehicle is to have really good braking. The
vehicle was designed and tested with top-quality
brake parts. When parts of the braking system are
replaced — for example, when the brake linings wear
down and new ones are installed — be sure to get new
approved replacement parts. If this is not done, the
brakes might not work properly. For example, if
someone puts in brake linings that are wrong for the
vehicle, the balance between the front and rear brakes
can change — for the worse. The braking performance
expected can change in many other ways if the
wrong replacement brake parts are installed.
5-14

6. Check that the jumper cables do not have loose
or missing insulation. If they do, you could get a
shock. The vehicles could be damaged too.
Before you connect the cables, here are some
basic things you should know. Positive (+) goes to
positive (+) or to a remote positive (+) terminal
if the vehicle has one. Negative (−) will go to
a heavy, unpainted metal engine part or a solid
engine ground.
Do not connect positive (+) to negative (−)oryou
will get a short that would damage the battery
and maybe other parts too. Do not connect
the negative (−) cable to the negative (−) terminal
on the dead battery because this can cause sparks.
7. Connect the red positive (+) cable to the positive (+)
terminal of the vehicle with the dead battery.
Use a remote positive (+) if the vehicle has one.8. Do not let the other end touch metal. Connect it
to the positive (+) terminal of the good battery.
Use a remote positive (+) if the vehicle has one.
9. Now connect the black negative (−) cable to the
negative (−) terminal of the good battery. Use a
remote negative (−) if the vehicle has one.
Do not let the other end touch anything until the
next step. The other end of the negative (−) cable
does not go to the dead battery. It goes to a
heavy, unpainted metal engine part or to the remote
negative (−) terminal on the vehicle with the dead
battery.
10. Connect the other end of the negative (−) cable to
the remote negative (−) terminal, on the vehicle
with the dead battery.
11. Now start the vehicle with the good battery and run
the engine for a while.
12. Try to start the vehicle that had the dead battery.
If it will not start after a few tries, it probably needs
service.
5-19

Replacement Bulbs
Exterior Lamp Bulb Number
Back-up Lamp and Rear Turn
Signal Lamp3156
Sidemarker Lamp 194
For replacement bulbs not listed here, contact your
dealer/retailer.
Electrical System
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from
short circuits by a combination of fuses, circuit breakers
and fusible thermal links. This greatly reduces the
chance of fires caused by electrical problems.
Be sure you replace a bad fuse with a new one of the
identical size and rating.If you ever have a problem on the road and do not have
a spare fuse, you can borrow one that has the same
amperage. Just pick some feature of the vehicle that you
can get along without, like the radio or cigarette
lighter, and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
The vehicle also has a special fuse in the battery box
for the 300-volt batteries. If this fuse has failed and
needs to be replaced, the vehicle will be disabled and
you will need to have the vehicle repaired by your
dealer/retailer. Do not attempt to self-service this fuse.
Underhood Fuse Block
Hybrid Auxiliary Underhood Fuse
Block
The hybrid underhood fuse block is located in the
engine compartment near the front of the vehicle.
Lift the cover for access to the fuse/relay block.
SeeEngine Compartment Overview on page 5-4for
more information on its location. For more information on
the main underhood fuse block, see “Underhood Fuse
Block” in the owner manual.
5-22

•One or more TPMS sensors are missing or
damaged. The DIC message and the TPMS
malfunction light should go off when the TPMS
sensors are installed and the sensor matching
process is performed successfully. See your
dealer/retailer for service.
•Replacement tires or wheels do not match your
vehicle’s original equipment tires or wheels.
Tires and wheels other than those recommended
for your vehicle could prevent the TPMS from
functioning properly. See “Buying New Tires” in
the Index of the owner manual.
•Operating electronic devices or being near facilities
using radio wave frequencies similar to the TPMS
could cause the TPMS sensors to malfunction.
If the TPMS is not functioning it cannot detect or
signal a low tire condition. See your dealer/retailer for
service if the TPMS malfunction light and DIC message
comes on and stays on.
TPMS Sensor Matching Process
Each TPMS sensor has a unique identification code.
Any time you rotate your vehicle’s tires or replace one or
more of the TPMS sensors, the identification codes
will need to be matched to the new tire/wheel position.
The sensors are matched to the tire/wheel positions
in the following order: driver side front tire, passenger
side front tire, passenger side rear tire, and driver
side rear tire using a TPMS diagnostic tool. See your
dealer/retailer for service.
The TPMS sensors can also be matched to each
tire/wheel position by increasing or decreasing the tire’s
air pressure. If increasing the tire’s air pressure, do
not exceed the maximum inflation pressure indicated on
the tire’s sidewall.
To decrease air-pressure out of a tire you can use the
pointed end of the valve cap, a pencil-style air pressure
gage, or a key.
5-27

S
Seats
Manual Lumbar............................................. 1-2
Manual Reclining Seatbacks........................... 1-3
Power Seats................................................. 1-2
Service, Doing Your Own Work.......................... 5-2
Specifications, Capacities.................................5-52
StabiliTrak
®Indicator Light................................. 3-7
Starting Your Vehicle......................................... 2-3
Storing the Tire Sealant and Compressor Kit......5-50
T
Tachometer...................................................... 3-4
Taillamps
Turn Signal, Stoplamps and
Back-up Lamps........................................5-21
Tire Sealant
Storing.......................................................5-50Tires
Chains.......................................................5-30
If a Tire Goes Flat.......................................5-30
Inflation, Pressure........................................5-24
Inspection and Rotation................................5-29
Tire Sealant and Compressor Kit...........5-32, 5-42
Towing
Towing Your Vehicle...................................... 4-2
Trailer.......................................................... 4-2
Transmission, Automatic Fluid............................. 5-5
V
Vehicle
Running While Parked..................................2-10
Voltage Devices, High and Wiring....................... 5-3
W
Wiring, High Voltage Devices............................. 5-3
4