2005 GMC YUKON check engine light

Avoid needless heavy braking. Some people drive in
spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is
a mistake. Your brakes may not have time to cool
between hard stops. Your brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.
If your engine ever stops while you are driving, brake
normally but do not pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and
the brake pedal will be harder to push.Anti-Lock Brake System (ABS)
Your vehicle has anti-lock brakes. ABS is an advanced
electronic braking system that will help prevent a
braking skid.
When you start your engine and begin to drive away,
your anti-lock brake system will check itself. You
may hear a momentary motor or clicking noise while
this test is going on. This is normal.
If there is a problem with
the anti-lock brake system,
this warning light will
stay on. SeeAnti-Lock
Brake System Warning
Light on page 3-44.
Along with ABS, your vehicle has a Dynamic Rear
Proportioning (DRP) system. If there is a DRP problem,
both the brake and ABS warning lights will come on
accompanied by a 10-second chime. The lights and
chime will come on each time the ignition is turned on
until the problem is repaired. See your dealer for service.
4-6

You can run the engine to keep warm, but be careful.
{CAUTION:
Snow can trap exhaust gases under your
vehicle. This can cause deadly CO (carbon
monoxide) gas to get inside. CO could
overcome you and kill you. You cannot see it
or smell it, so you might not know it is in your
vehicle. Clear away snow from around the
base of your vehicle, especially any that is
blocking your exhaust pipe. And check around
again from time to time to be sure snow does
not collect there.
Open a window just a little on the side of the
vehicle that is away from the wind. This will
help keep CO out.
Run your engine only as long as you must. This saves
fuel. When you run the engine, make it go a little
faster than just idle. That is, push the accelerator
slightly. This uses less fuel for the heat that you get and
it keeps the battery charged. You will need a
well-charged battery to restart the vehicle, and possibly
for signaling later on with your headlamps. Let the
heater run for a while.
4-48

How to Add Automatic Transmission
Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission uid to use. SeeRecommended
Fluids and Lubricants on page 6-13.
Add uid only after checking the transmission uid while
it is hot. A cold check is used only as a reference.
If the uid level is low, add only enough of the proper
uid to bring the level up to the HOT area for a hot
check. It does not take much uid, generally less than
one pint (0.5 L).Do not overll.
Notice:Use of the incorrect automatic transmission
uid may damage your vehicle, and the damages
may not be covered by your warranty. Always
use the automatic transmission uid listed in
Recommended Fluids and Lubricants on page 6-13.
After adding uid, recheck the uid level as
described under “How to Check Automatic
Transmission Fluid,” earlier in this section.
When the correct uid level is obtained, push the
dipstick back in all the way; then ip the handle
down to lock the dipstick in place.
Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is designed
to remain in your vehicle for ve years or 150,000 miles
(240 000 km), whichever occurs rst, if you add only
DEX-COOL
®extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem with
engine overheating, seeEngine Overheating on
page 5-27.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights and gages work as they
should.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
5-24

{CAUTION:
Using a match near a battery can cause battery
gas to explode. People have been hurt doing
this, and some have been blinded. Use a
ashlight if you need more light.
Be sure the battery has enough water. You do
not need to add water to the battery installed
in your new vehicle. But if a battery has ller
caps, be sure the right amount of uid is there.
If it is low, add water to take care of that rst.
If you do not, explosive gas could be present.
Battery uid contains acid that can burn you.
Do not get it on you. If you accidentally get it
in your eyes or on your skin, ush the place
with water and get medical help immediately.
{CAUTION:
Fans or other moving engine parts can injure
you badly. Keep your hands away from moving
parts once the engine is running.
5. 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 (+) will go to
positive (+) or to a remote positive (+) terminal if
the vehicle has one. Negative (−) will go to a heavy,
unpainted metal engine part or to a remote
negative (−) terminal if the vehicle has one.
Do not connect positive (+) to negative (−)oryou
will get a short that would damage the battery
and maybe other parts too. And do not connect the
negative (−) cable to the negative (−) terminal on
the dead battery because this can cause sparks.
5-43

The TPM sensor matching process is outlined below:
1. Set the Parking brake.
2. Turn the ignition switch to RUN with the engine off.
3. Turn the exterior lamp switch from “Off” to “On”
four times within 3 seconds. A double horn chirp
will sound and the TPM low tire warning light
will begin to ash. The double horn chirp and
ashing TPM warning light indicate that the TPM
matching process has started. The TPM warning
light should continue ashing throughout the
matching procedure. The SERVICE TIRE
MONITOR message will be displayed on the
Driver Information Center (DIC).
4. Start with the left (driver’s side) front tire.
5. Remove the valve cap from the valve cap stem.
Activate the TPM sensor by increasing or
decreasing the tire’s air pressure for 10 seconds,
then stop and listen for a single horn chirp.
The single horn chirp should sound within
15 seconds, conrming that the sensor identication
code has been matched to this tire and wheel
position. If you do not hear the conrming single
horn chirp, you will need to start over with step
number one. To let air-pressure out of a tire you can
use the pointy end of the valve cap, a pencil-style
air pressure gage or a key.6. Proceed to the right (passenger’s side) front tire,
and repeat the procedure in Step 5.
7. Proceed to the right (passenger’s side) rear tire,
and repeat the procedure in Step 5.
8. Proceed to the left (driver’s side) rear tire, and
repeat the procedure in Step 5.
9. After hearing the conrming horn chirp for the left
rear tire, check to see if the TPM warning light is
still ashing. If yes, turn the ignition switch to LOCK.
10. Set all four tires to the recommended air pressure
level as indicated on the Tire and Loading
Information label.
11. Put the valve caps back on the valve stems
The spare tire does not have a TPM sensor. If you
replace one of the road tires with the spare, the CHECK
TIRE PRESSURE message will be displayed on the
DIC screen. This message should go off once you
re-install the road tire containing the TPM sensor. The
SERVICE TIRE MONITOR message is displayed
when the TPM system is malfunctioning. One or more
missing or inoperable TPM sensors will cause the
service tire monitor message to be displayed. See your
dealer for service.
5-67

Bulb Replacement (cont.)
Roof Marker Lamps.....................................5-52
Side Identication Marker Lamps...................5-52
Taillamps....................................................5-54
Buying New Tires...........................................5-70
C
California Fuel.................................................. 5-5
Canadian Owners................................................ ii
Capacities and Specications..........................5-114
Carbon Monoxide...................2-13, 2-39, 4-45, 4-67
Care of
Safety Belts................................................5-99
Your Cassette Tape Player..........................3-133
Your CD and DVD Player...........................3-134
Your CDs and DVDs..................................3-134
Cargo Cover..................................................2-58
Center Console Storage Area...........................2-56
Center Passenger Position, Safety Belts.............1-36
Chains, Tire...................................................5-75
Check
Engine Light...............................................3-48
Checking Things Under the Hood......................5-10
Chemical Paint Spotting.................................5-102Child Restraints
Child Restraint Systems...............................1-49
Infants and Young Children...........................1-45
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-56
Older Children.............................................1-43
Securing a Child Restraint Designed for the
LATCH System........................................1-58
Securing a Child Restraint in a Center Rear
Seat Position...........................................1-61
Securing a Child Restraint in a Rear Outside
Seat Position...........................................1-59
Securing a Child Restraint in the Center Front
Seat Position...........................................1-62
Securing a Child Restraint in the Right Front
Seat Position...........................................1-63
Top Strap...................................................1-53
Top Strap Anchor Location............................1-54
Where to Put the Restraint...........................1-52
Chime Level Adjustment.................................3-135
Cigarette Lighter.............................................3-20
Cleaning
Aluminum or Chrome-Plated Wheels.............5-101
Exterior Lamps/Lenses.................................5-99
Fabric/Carpet..............................................5-97
Finish Care...............................................5-100
3

Door
Delayed Locking..........................................2-10
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
Programmable Automatic Door Locks.............2-10
Rear Door Security Locks.............................2-12
Driver
Position, Safety Belt.....................................1-28
Driver Information Center (DIC).........................3-54
DIC Operation and Displays..........................3-55
DIC Vehicle Customization............................3-68
DIC Warnings and Messages........................3-58
Driving
At Night.....................................................4-36
City...........................................................4-40
Defensive..................................................... 4-2
Drunken....................................................... 4-2
Freeway.....................................................4-41
Hill and Mountain Roads..............................4-43
In Rain and on Wet Roads...........................4-37
Off-Road....................................................4-21
Recovery Hooks..........................................4-50
Rocking Your Vehicle to Get it Out.................4-50
Winter........................................................4-45
Dual Automatic Climate Control System.............3-24
Dual Climate Control System............................3-22
DVD
Rear Seat Entertainment System..................3-118E
Electrical System
Add-On Equipment.....................................5-105
Center Instrument Panel Fuse Block.............5-108
Fuses and Circuit Breakers.........................5-105
Instrument Panel Fuse Block.......................5-106
Power Windows and Other Power Options....5-105
Underhood Fuse Block...............................5-109
Windshield Wiper Fuses.............................5-105
Engine
Air Cleaner/Filter.........................................5-19
Battery.......................................................5-40
Check and Service Engine Soon Light............3-48
Coolant......................................................5-24
Coolant Heater............................................2-22
Coolant Temperature Gage...........................3-46
Engine Compartment Overview......................5-12
Exhaust.....................................................2-39
Fan Noise..................................................5-34
Oil .............................................................5-15
Oil Life System...........................................5-18
Overheated Protection Operating Mode...........5-29
Overheating................................................5-27
Starting......................................................2-21
Entry Lighting.................................................3-18
Event Data Recorders (EDR)............................. 7-8
Exit Lighting...................................................3-18
Extender, Safety Belt.......................................1-42
5

Reclining Seatbacks.......................................... 1-6
Recommended Fluids and Lubricants.................6-13
Recovery Hooks.............................................4-50
Recreational Vehicle Towing.............................4-62
Remote Keyless Entry System............................ 2-4
Remote Keyless Entry System, Operation............ 2-5
Removing the Flat Tire and Installing
the Spare Tire.............................................5-81
Removing the Spare Tire and Tools...................5-78
Replacement Bulbs.........................................5-56
Reporting Safety Defects
Canadian Government..................................7-10
General Motors...........................................7-11
United States Government............................7-10
Restraint System Check
Checking the Restraint Systems....................1-81
Replacing Restraint System Parts
After a Crash..........................................1-82
Retained Accessory Power (RAP)......................2-20
Right Front Passenger Position, Safety Belts......1-36
Roadside
Assistance Program....................................... 7-5
Rocking Your Vehicle to Get it Out....................4-50
Running the Engine While Parked.....................2-40S
Safety Belt
Reminder Light............................................3-39
Safety Belts
Care of......................................................5-99
Center Passenger Position............................1-36
Driver Position............................................1-28
How to Wear Safety Belts Properly................1-27
Questions and Answers About Safety Belts.....1-26
Rear Safety Belt Comfort Guides for Children
and Small Adults......................................1-40
Rear Seat Passengers.................................1-37
Right Front Passenger Position......................1-36
Safety Belt Extender....................................1-42
Safety Belt Use During Pregnancy.................1-35
Safety Belts Are for Everyone.......................1-22
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seats
50/50 Split Bench Seat.................................1-11
60/40 Split Bench Seat.................................. 1-8
Bench Seat................................................1-15
Bucket Seats, Rear......................................1-19
Head Restraints............................................ 1-7
Heated Seats............................................... 1-5
12