2009 GMC ACADIA check engine

{CAUTION
Performing maintenance work on
a vehicle can be dangerous. In
trying to do some jobs, you can
be seriously injured. Do your own
maintenance work only if you
have the required know-how and
the proper tools and equipment
for the job. If you have any doubt,
see your dealer/retailer to have a
qualied technician do the work.
SeeDoing Your Own Service
Work on page 5-4.
Some maintenance services can
be complex. So, unless you
are technically qualied and have
the necessary equipment, have
your dealer/retailer do these jobs.When you go to your dealer/retailer
for service, trained and supported
service technicians will perform
the work using genuine parts.
To purchase service information,
seeService Publications Ordering
Information on page 7-15.
Owner Checks and Services on
page 6-9tells what should be
checked, when to check it, and what
can easily be done to help keep
the vehicle in good condition.
The proper replacement parts, uids,
and lubricants to use are listed in
Recommended Fluids and
Lubricants on page 6-12and
Maintenance Replacement Parts on
page 6-14. When the vehicle is
serviced, make sure these are used.
All parts should be replaced and all
necessary repairs done before you
or anyone else drives the vehicle.
We recommend the use of genuine
parts from your dealer/retailer.
Scheduled Maintenance
When the CHANGE ENGINE OIL
SOON message displays, service is
required for the vehicle. Have the
vehicle serviced as soon as possible
within the next 600 miles (1 000 km).
It is possible that, if driving under the
best conditions, the engine oil life
system might not indicate that
vehicle service is necessary for over
a year. However, the engine oil and
lter must be changed at least once
a year and at this time the system
must be reset. Your dealer/retailer
has trained service technicians who
will perform this work using genuine
parts and reset the system.
Maintenance Schedule 6-3

If the engine oil life system is ever
reset accidentally, service the vehicle
within 3,000 miles (5 000 km) since
the last service. Remember to reset
the oil life system whenever the oil
is changed. SeeEngine Oil Life
System on page 5-13for information
on the Engine Oil Life System and
resetting the system.
When the CHANGE ENGINE OIL
SOON message appears, certain
services, checks, and inspections
are required. Required services
are described in the following
for “MaintenanceI” and
“MaintenanceII.” Generally, it is
recommended that the rst service
be MaintenanceI, the second
service be MaintenanceII, and then
alternate MaintenanceIand
MaintenanceIIthereafter. However,
in some cases, MaintenanceIImay
be required more often.MaintenanceI—Use
MaintenanceIif the CHANGE
ENGINE OIL SOON message
displays within 10 months since the
vehicle was purchased or
MaintenanceIIwas performed.
MaintenanceII—Use
MaintenanceIIif the previous
service performed was
MaintenanceI. Always use
MaintenanceIIwhenever the
message displays 10 months or
more since the last service or if the
message has not come on at all
for one year.
6-4 Maintenance Schedule

Scheduled Maintenance
ServiceMaintenanceIMaintenance II
Change engine oil and lter. See Engine Oil on page 5-11. Reset oil life system.
See Engine Oil Life System on page 5-13 .An Emission Control Service. ••
Visually check for any leaks or damage. See footnote (g). ••
Inspect engine air cleaner lter. If necessary, replace lter. See Engine Air
Cleaner/Filter on page 5-15 .See footnote (l). •
Rotate tires and check ination pressures and wear. See Tire Inspection and
Rotation on page 5-47 and “Tire Wear Inspection” in At Least Once a Month on
page 6-9. ••
Inspect brake system. See footnote (a). ••
Check engine coolant and windshield washer uid levels and add uid as
needed. ••
Perform any needed additional services. See “Additional Required Services” in
this section. ••
Inspect suspension and steering components. See footnote (b). •
Inspect engine cooling system. See footnote (c). •
Inspect wiper blades. See footnote (d). •
Inspect restraint system components. See footnote (e). •
Lubricate body components. See footnote (f). •
Inspect throttle system. See footnote (j). •
Maintenance Schedule 6-5

Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000) 50,000
(80 000) 75,000
(120 000) 100,000
(160 000) 125,000
(200 000) 150,000
(240 000)
Engine cooling system service (or
every ve years, whichever occurs
rst). An Emission Control Service.
See footnote (i). •
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (k). •
Maintenance Footnotes
(a)
Visually inspect brake lines and
hoses for proper hook-up, binding,
leaks, cracks, chafing, etc. Inspect
disc brake pads for wear and rotors
for surface condition. Inspect other
brake parts, including calipers,
parking brake, etc. Check parking
brake adjustment.
(b) Visually inspect front and rear
suspension and steering system for
damaged, loose, or missing parts or
signs of wear. Inspect power steering
lines and hoses for proper hook-up,
binding, leaks, cracks, chafing, etc. (c)
Visually inspect hoses and have
them replaced if they are cracked,
swollen, or deteriorated. Inspect all
pipes, fittings and clamps; replace
with genuine parts as needed.
To help ensure proper operation,
a pressure test of the cooling system
and pressure cap and cleaning
the outside of the radiator and
air conditioning condenser is
recommended at least once a year. (d)
Inspect wiper blades for wear,
cracking, or contamination. Clean
the windshield and wiper blades,
if contaminated. Replace wiper
blades that are worn or damaged.
See Windshield Wiper Blade
Replacement on page 5-34 and
Windshield, Backglass, and Wiper
Blades on page 5-86 for more
information.
Maintenance Schedule 6-7

(e)Make sure the safety belt
reminder light and safety belt
assemblies are working properly.
Look for any other loose or damaged
safety belt system parts. If you see
anything that might keep a safety belt
system from doing its job, have it
repaired. Have any torn or frayed
safety belts replaced. Also see
Checking the Restraint Systems on
page 1-61.
(f)Lubricate all key lock cylinders,
hood latch assemblies, secondary
latches, pivots, spring anchor and
release pawl, hood and door hinges,
rear folding seats, and liftgate
hinges. More frequent lubrication
may be required when exposed to a
corrosive environment. Applying
silicone grease on weatherstrips with
a clean cloth will make them last
longer, seal better, and not stick or
squeak.
(g)A fluid loss in any vehicle
system could indicate a problem.
Have the system inspected
and repaired and the fluid level
checked. Add fluid if needed.(h)Change automatic transmission
fluid if the vehicle is mainly
driven under one or more of these
conditions:
In heavy city traffic where the
outside temperature regularly
reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer
towing.
Uses such as found in taxi,
police, or delivery service.
(i)Drain, flush, and refill cooling
system. This service can be
complex; you should have your
dealer/retailer perform this service.
See Engine Coolant on page 5-17 for
what to use. Inspect hoses. Clean
radiator, condenser, pressure cap,
and filler neck. Pressure test the
cooling system and pressure cap.
(j)Check system for interference or
binding and for damaged or missing
parts. Replace parts as needed.
Replace any components that havehigh effort or excessive wear. Do not
lubricate accelerator or cruise control
cables.
(k)Visually inspect belt for fraying,
excessive cracks, or obvious
damage. Replace belt if necessary.
(l)If driving regularly under dusty
conditions, inspect the filter at each
engine oil change.
(m)Change transfer case fluid if the
vehicle is mainly driven under
one or more of these conditions:
In heavy city traffic where
the outside temperature regularly
reaches 90°F (32°C) or higher.
In hilly or mountainous terrain.
When doing frequent trailer
towing.
Uses such as found in taxi,
police, or delivery service.
6-8 Maintenance Schedule

Owner Checks and
Services
These owner checks and services
should be performed at the intervals
specied to help ensure vehicle
safety, dependability, and emission
control performance. Your dealer/
retailer can assist with these checks
and services.
Be sure any necessary repairs are
completed at once. Whenever
any uids or lubricants are added to
the vehicle, make sure they are
the proper ones, as shown in
Recommended Fluids and
Lubricants on page 6-12.
At Each Fuel Fill
It is important to perform these
underhood checks at each fuel fill.
Engine Oil Level Check
Notice:It is important to check
the engine oil regularly and keep it
at the proper level. Failure to keepthe engine oil at the proper level
can cause damage to the engine
not covered by the vehicle
warranty.
Check the engine oil level and add
the proper oil if necessary. See
Engine Oil on page 5-11.
Engine Coolant Level Check
Check the engine coolant level
and add DEX-COOL®coolant
mixture if necessary. SeeEngine
Coolant on page 5-17.
Windshield Washer Fluid
Level Check
Check the windshield washer uid
level in the windshield washer uid
reservoir and add the proper uid if
necessary.
At Least Once a Month
Tire Ination Check
Inspect the vehicle’s tires and make
sure they are inated to the correct
pressures. Do not forget to check
the spare tire, if the vehicle has one.
SeeInflation - Tire Pressure on
page 5-41. If the vehicle has a spare
tire, check to make sure it is stored
securely. SeeChanging a Flat Tire
on page 5-69.
Tire Wear Inspection
Tire rotation may be required for high
mileage highway drivers prior to the
Engine Oil Life System service
notication. Check the tires for wear
and, if necessary, rotate the tires.
SeeTire Inspection and Rotation on
page 5-47.
Maintenance Schedule 6-9

At Least Once a Year
Starter Switch Check
{CAUTION
When you are doing this
inspection, the vehicle could move
suddenly. If the vehicle moves,
you or others could be injured.
1. Before starting this check, be
sure there is enough room
around the vehicle.
2. Firmly apply both the parking
brake and the regular brake.
SeeParking Brake on page 2-27.
Do not use the accelerator
pedal, and be ready to turn off
the engine immediately if it starts.
3. Try to start the engine in
each gear. The vehicle should
start only in P (Park) or
N (Neutral). If the vehicle starts
in any other position, contact
your dealer/retailer for service.
Automatic Transmission Shift
Lock Control System Check
{CAUTION
When you are doing this
inspection, the vehicle could move
suddenly. If the vehicle moves,
you or others could be injured.
1. Before starting this check, be
sure there is enough room
around the vehicle. It should be
parked on a level surface.
2. Firmly apply the parking brake.
SeeParking Brake on page 2-27.
Be ready to apply the regular
brake immediately if the vehicle
begins to move.3. With the engine off, turn the
ignition to ON/RUN, but do
not start the engine. Without
applying the regular brake, try to
move the shift lever out of
P (Park) with normal effort. If the
shift lever moves out of
P (Park), contact your
dealer/retailer for service.
Ignition Transmission Lock
Check
While parked, and with the parking
brake set, try to turn the ignition
to LOCK/OFF in each shift
lever position.
The ignition should turn to
LOCK/OFF only when the
shift lever is in P (Park).
The ignition key should come out
only in LOCK/OFF.
Contact your dealer/retailer if
service is required.
6-10 Maintenance Schedule

Parking Brake and Automatic
Transmission P (Park)
Mechanism Check
{CAUTION
When you are doing this check,
the vehicle could begin to move.
You or others could be injured
and property could be damaged.
Make sure there is room in front
of the vehicle in case it begins to
roll. Be ready to apply the regular
brake at once should the vehicle
begin to move.Park on a fairly steep hill, with the
vehicle facing downhill. Keeping
your foot on the regular brake, set
the parking brake.
To check the parking brake’s
holding ability: With the engine
running and the transmission
in N (Neutral), slowly remove foot
pressure from the regular
brake pedal. Do this until the
vehicle is held by the parking
brake only.
To check the P (Park)
mechanism’s holding ability: With
the engine running, shift to
P (Park). Then release the
parking brake followed by the
regular brake.
Contact your dealer/retailer if
service is required.
Underbody Flushing Service
At least every spring, use plain water
to ush any corrosive materials from
the underbody. Take care to clean
thoroughly any areas where mud and
other debris can collect.
Tire Sealant and
Compressor Kit
If the vehicle has a Tire Sealant and
Compressor Kit, check the sealant
expiration date printed on the
instruction label of the kit at least
once a year. See your dealer/retailer
for a replacement canister.
Maintenance Schedule 6-11