2010 GMC YUKON DENALI check engine

SERVICE BRAKE SYSTEM
This message displays along with the brake system
warning light if there is a problem with the brake
system. SeeBrake System Warning Light
on
page 4‑32. If this message appears, stop as soon as
possible and turn off the vehicle. Restart the vehicle
and check for the message on the DIC display. If the
message is still displayed or appears again when you
begin driving, the brake system needs service as soon
as possible. See your dealer/retailer.
SERVICE BRAKES SOON
This message displays if there is a problem with the
brake system. If this message appears, stop as soon as
possible and turn off the vehicle. Restart the vehicle
and check for the message on the DIC display. If the
message is still displayed or appears again when you
begin driving, the brake system needs service.
See your dealer/retailer.
SERVICE PARK ASSIST
This message displays if there is a problem with the
Ultrasonic Rear Parking Assist (URPA) system. Do not
use this system to help you park. See Ultrasonic Rear
Parking Assist (URPA)
on page 3‑45for more
information. See your dealer/retailer for service.
SERVICE SIDE BLIND ZONE ALERT
SYSTEM
If your vehicle has the Side Blind Zone Alert (SBZA)
system and this message displays, both SBZA displays
will remain on indicating there is a problem with the
SBZA system. If these displays remain on after
continued driving, the system needs service. See your
dealer/retailer. See Side Blind Zone Alert (SBZA)
on
page 3‑47for more information.
SERVICE STABILITRAK
If your vehicle has StabiliTrak®and this message
displays, it means there may be a problem with the
StabiliTrak system. If you see this message, try to reset
the system. Stop; turn off the engine for at least
15 seconds; then start the engine again. If this message
still comes on, it means there is a problem. You should
see your dealer/retailer for service. The vehicle is safe
to drive, however, you do not have the benefit of
StabiliTrak, so reduce your speed and drive accordingly.
SERVICE SUSPENSION SYSTEM
If your vehicle has the Autoride®suspension system,
this message displays when the Autoride suspension
system is not operating properly. Have your vehicle
serviced by your dealer/retailer.
4-61

SERVICE THEFT DETERRENT SYSTEM
This message displays when there is a problem with the
theft-deterrent system. The vehicle may or may not
restart so you may want to take the vehicle to your
dealer/retailer before turning off the engine. See
PASS-Key
®III+ Electronic Immobilizer Operationon
page 3‑22for more information.
SERVICE TIRE MONITOR SYSTEM
On vehicles with the Tire Pressure Monitor System
(TPMS), this message displays if a part on the TPMS is
not working properly. The tire pressure light also flashes
and then remains on during the same ignition cycle.
See Tire Pressure Light
on page 4‑34. Several
conditions may cause this message to appear. See Tire
Pressure Monitor Operation
on page 6‑68for more
information. If the warning comes on and stays on,
there may be a problem with the TPMS. See your
dealer/retailer.
SERVICE TRACTION CONTROL
If your vehicle has StabiliTrak, this message displays
when there is a problem with the Traction Control
System (TCS). When this message displays, the
system will not limit wheel spin. Adjust your driving
accordingly. See your dealer/retailer for service.
See StabiliTrak
®Systemon page 5‑6for more
information.
SERVICE TRAILER BRAKE SYSTEM
On vehicles with the Integrated Trailer Brake Control
(ITBC) system, this message displays and a chime
sounds when there is a problem with the ITBC system.
When this message displays, power is no longer
available to the trailer brakes.
As soon as it is safe to do so, carefully pull your vehicle
over to the side of the road and turn the ignition off.
Check the wiring connection to the trailer and turn the
ignition back on. If this message still displays, either
your vehicle or the trailer needs service. See your
dealer/retailer.
See “Integrated Trailer Brake Control System” under
Towing a Trailer
on page 5‑42for more information.
SIDE BLIND ZONE ALERT
SYSTEM OFF
If your vehicle has the Side Blind Zone Alert (SBZA)
system, this message displays when the SBZA system
has been turned off. See Side Blind Zone Alert (SBZA)
on page 3‑47andDIC Operation and Displays (Using
DIC Buttons)on page 4‑43or DIC Operation and
Displays (Using Trip Odometer Reset Stem)on
page 4‑50for more information.
4-62

SIDE BLIND ZONE SYSTEM
UNAVAILABLE
If your vehicle has the Side Blind Zone Alert (SBZA)
system, this message displays when the SBZA system
is disabled because the sensor is blocked and cannot
detect vehicles in your blind zone. The sensor may be
blocked by mud, dirt, snow, ice, or slush. This message
may also display during heavy rain or due to road spray.
It may also come on when driving in isolated areas
with no guardrails, trees, or road signs and light traffic.
Your vehicle does not need service. For cleaning
instructions, seeWashing Your Vehicle
on page 6‑102.
See Side Blind Zone Alert (SBZA)on page 3‑47for
more information.
STABILITRAK OFF
If your vehicle has StabiliTrak, this message displays
when you turn off StabiliTrak, or when the stability
control has been automatically disabled. To limit
wheel spin and realize the full benefits of the stability
enhancement system, you should normally leave
StabiliTrak on. However, you should turn StabiliTrak off
if your vehicle gets stuck in sand, mud, ice, or snow and
you want to rock your vehicle to attempt to free it, or if you are driving in extreme off-road conditions and
require more wheel spin. See
If Your Vehicle is Stuck in
Sand, Mud, Ice, or Snow
on page 5‑29. To turn the
StabiliTrak system on or off, see StabiliTrak®Systemon page 5‑6.
There are several conditions that can cause this
message to appear.
.One condition is overheating, which could occur if
StabiliTrak activates continuously for an extended
period of time.
.The message also displays if the brake system
warning light is on. See Brake System Warning
Light on page 4‑32.
.The message could display if the stability system
takes longer than usual to complete its diagnostic
checks due to driving conditions.
.The message displays if an engine or vehicle
related problem has been detected and the vehicle
needs service. See your dealer/retailer.
The message turns off as soon as the conditions that
caused the message to be displayed are no longer
present.
4-63

TIGHTEN GAS CAP
This message may display along with the check engine
light on the instrument panel cluster if the vehicle's fuel
cap is not tightened properly. SeeMalfunction Indicator
Lamp
on page 4‑35. Reinstall the fuel cap fully.
See Filling the Tankon page 6‑9. The diagnostic
system can determine if the fuel cap has been left off or
improperly installed. A loose or missing fuel cap allows
fuel to evaporate into the atmosphere. A few driving
trips with the cap properly installed should turn this light
and message off.
TIRE LEARNING ACTIVE
On vehicles with the Tire Pressure Monitor System
(TPMS), this message displays when the TPMS is
re-learning the tire positions on your vehicle. The tire
positions must be re-learned after rotating the tires or
after replacing a tire or sensor. See Tire Inspection and
Rotation
on page 6‑71, Tire Pressure Monitor Systemon page 6‑66, and Inflation - Tire Pressureon
page 6‑64for more information.
TIRE LOW ADD AIR TO TIRE
On vehicles with the Tire Pressure Monitor System
(TPMS), this message displays when the pressure in
one or more of the vehicle's tires needs to be checked.
This message also displays LEFT FRT (left front),
RIGHT FRT (right front), LEFT RR (left rear), or
RIGHT RR (right rear) to indicate the location of the low
tire. The low tire pressure warning light will also come
on. See Tire Pressure Light
on page 4‑34.
You can receive more than one tire pressure message
at a time. To read the other messages that may have
been sent at the same time, press the set/reset button
or the trip odometer reset stem. If a tire pressure
message appears on the DIC, stop as soon as you can.
Have the tire pressures checked and set to those
shown on the Tire Loading Information label. See Tires
on page 6‑57,Loading the Vehicleon page 5‑31, and
Inflation - Tire Pressureon page 6‑64. The DIC also
shows the tire pressure values. See “DIC Operation and
Displays (Using DIC Buttons)” earlier in this section.
TRACTION CONTROL OFF
If your vehicle has StabiliTrak, this message displays
when the Traction Control System (TCS) is turned off.
Adjust your driving accordingly. See StabiliTrak
®
Systemon page 5‑6for more information.
4-64

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.
The brakes might not have time to cool between hard
stops. The brakes will wear out much faster with a lot of
heavy braking. Keeping pace with the traffic and
allowing realistic following distances eliminates a lot of
unnecessary braking. That means better braking and
longer brake life.
If the engine ever stops while the vehicle is being
driven, brake normally but do not pump the brakes.
If the brakes are pumped, the pedal could get harder to
push down. If the engine stops, there will still be some
power brake assist but it will be used when the brake is
applied. Once the power assist is used up, it can take
longer to stop and the brake pedal will be harder
to push.
Adding non‐dealer/non‐retailer accessories can affect
vehicle performance. SeeAccessories and
Modifications on page 6‑3.Antilock Brake System (ABS)
This vehicle has the Antilock Brake System (ABS), an
advanced electronic braking system that helps prevent
a braking skid.
When the engine is started and the vehicle begins to
drive away, ABS checks itself. A momentary motor or
clicking noise might be heard while this test is going on.
This is normal.
If there is a problem with
ABS, this warning light
stays on. See Antilock
Brake System (ABS)
Warning Light
on
page 4‑33.
Along with ABS, the vehicle has a Dynamic Rear
Proportioning (DRP) system. If there is a DRP problem,
both the brake and ABS warning lights 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/retailer for
service.
5-4

Before You Go Off-Roading
.Have all necessary maintenance and service
work done.
.Make sure there is enough fuel, that fluid levels are
where they should be, and that the spare tire is
fully inflated.
.Be sure to read all the information about
all-wheel-drive vehicles in this manual.
.Make sure all underbody shields, if the vehicle has
them, are properly attached.
.Know the local laws that apply to off-roading where
you will be driving or check with law enforcement
people in the area.
.Be sure to get the necessary permission if you will
be on private land.
If you think you will need some more ground clearance
at the front of your vehicle, you can remove the front
fascia lower air dam. The air dam is held in place by
two bolts and 10 snaps accessible from underneath the
front fascia. To remove the air dam:
1. Remove the two outboard air dam bolts.
2. With a flat‐blade tool, disengage the snaps.
3. After the bolts are removed and the snaps are disengaged, push forward on the air dam until it
is free.
Notice: Operating your vehicle for extended periods
without the front fascia lower air dam installed can
cause improper air flow to the engine. Always be
sure to replace the front fascia air dam when you
are finished off-road driving.
After off-roading, be sure to reinstall the air dam:
1. Line up the snaps and push the air dam rearward to engage the snaps.
2. Install the two outboard bolts.
5-13

Driving in Water
{WARNING:
Driving through rushing water can be dangerous.
Deep water can sweep your vehicle downstream
and you and your passengers could drown. If it is
only shallow water, it can still wash away the
ground from under your tires, and you could lose
traction and roll the vehicle over. Do not drive
through rushing water.
Heavy rain can mean flash flooding, and flood waters
demand extreme caution.
Find out how deep the water is before driving through it.
Do not try it if it is deep enough to cover the wheel
hubs, axles, or exhaust pipe —you probably will not get
through. Deep water can damage the axle and other
vehicle parts.
If the water is not too deep, drive slowly through it. At
faster speeds, water splashes on the ignition system
and the vehicle can stall. Stalling can also occur if you
get the tailpipe under water. If the tailpipe is under
water, you will never be able to start the engine. When
going through water, remember that when the brakes
get wet, it might take longer to stop. See Driving in Rain
and on Wet Roads on page 5‑24.
After Off-Road Driving
Remove any brush or debris that has collected on the
underbody, chassis, or under the hood. These
accumulations can be a fire hazard.
After operation in mud or sand, have the brake linings
cleaned and checked. These substances can cause
glazing and uneven braking. Check the body structure,
steering, suspension, wheels, tires, and exhaust system
for damage and check the fuel lines and cooling system
for any leakage.
The vehicle requires more frequent service due to
off-road use. Refer to the Maintenance Schedule for
additional information.
5-23

Hydroplaning
Hydroplaning is dangerous. Water can build up under
your vehicle's tires so they actually ride on the water.
This can happen if the road is wet enough and you are
going fast enough. When your vehicle is hydroplaning, it
has little or no contact with the road.
There is no hard and fast rule about hydroplaning. The
best advice is to slow down when the road is wet.
Other Rainy Weather Tips
Besides slowing down, other wet weather driving tips
include:
.Allow extra following distance.
.Pass with caution.
.Keep windshield wiping equipment in good shape.
.Keep the windshield washer fluid reservoir filled.
.Have good tires with proper tread depth. SeeTireson page 6‑57.
.Turn off cruise control.
Before Leaving on a Long Trip
To prepare your vehicle for a long trip, consider having
it serviced by your dealer/retailer before departing.
Things to check on your own include:
.Windshield Washer Fluid:Reservoir full? Windows
clean —inside and outside?
.Wiper Blades: In good shape?
.Fuel, Engine Oil, Other Fluids: All levels checked?
.Lamps:Do they all work and are lenses clean?
.Tires:Are treads good? Are tires inflated to
recommended pressure?
.Weather and Maps: Safe to travel? Have
up-to-date maps?
5-25