ECU GMC SAVANA 2005 Service Manual

{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
Occasionally check the coolant level in the radiator.
For information on how to add coolant to the radiator,
seeCooling System on page 5-27.
Radiator Pressure Cap
The radiator pressure cap is located near the center of
the engine compartment. SeeEngine Compartment
Overview on page 5-12for more information on location.
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
You will nd an engine coolant temperature gage on
your vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 3-32for more information.
5-25

Dual Tire Operation
When the vehicle is new, or whenever a wheel, wheel
bolt or wheel nut is replaced, check the wheel nut torque
after 100, 1,000 and 6,000 miles (160, 1 600 and
10 000 km) of driving. For proper wheel nut tightening
information, see “Removing the Flat Tire and Installing
the Spare Tire” later in this section, underChanging
a Flat Tire on page 5-68. Also see “Wheel Nut Torque”
underCapacities and Specications on page 5-98.
The outer tire on a dual wheel setup generally wears
faster than the inner tire. Your tires will wear more
evenly and last longer if you rotate the tires periodically.
SeeTire Inspection and Rotation on page 5-60. Also
seeScheduled Maintenance on page 6-4.
{CAUTION:
If you operate your vehicle with a tire that is
badly underinated, the tire can overheat. An
overheated tire can lose air suddenly or catch
re. You or others could be injured. Be sure all
tires (including the spare) are properly inated.
SeeTires on page 5-52andInation - Tire Pressure on
page 5-58for more information on proper tire ination.
Tire Inspection and Rotation
Tires should be rotated every 5,000 to 8,000 miles
(8 000 to 13 000 km).
Any time you notice unusual wear, rotate your tires as
soon as possible and check wheel alignment. Also
check for damaged tires or wheels. SeeWhen It Is Time
for New Tires on page 5-62andWheel Replacement
on page 5-65for more information.
Make sure the spare tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If it moves,
use the ratchet/wheel wrench to tighten the cable. See
Changing a Flat Tire on page 5-68.
If your vehicle has dual rear wheels, also seeDual Tire
Operation on page 5-60.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The rst rotation
is the most important. SeeScheduled Maintenance
on page 6-4.
5-60

Tire Chains
{CAUTION:
If your vehicle has dual wheels or P235/75R16
or LT245/75R16 size tires, do not use tire
chains. They can damage your vehicle because
there’s not enough clearance. Tire chains used
on a vehicle without the proper amount of
clearance can cause damage to the brakes,
suspension or other vehicle parts. The area
damaged by the tire chains could cause you to
lose control of your vehicle and you or others
may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination and road
conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it’s contacting your vehicle, and don’t
spin your wheels.
If you do nd traction devices that will t,
install them on the rear tires.Notice:If your vehicle does not have dual wheels
and is equipped with a tire size other than
P235/75R16 or LT245/75R16, use tire chains only
where legal and only when you must. Use chains
that are the proper size for your tires. Install them on
the tires of the rear axle. Do not use chains on the
tires of the front axle. Tighten them as tightly as
possible with the ends securely fastened. Drive
slowly and follow the chain manufacturer’s
instructions. If you can hear the chains contacting
your vehicle, stop and retighten them. If the contact
continues, slow down until it stops. Driving too
fast or spinning the wheels with chains on will
damage your vehicle.
5-67

Removing the Spare Tire and Tools
If you have a cargo van or
a passenger van, the
equipment you will need is
located in the passenger
side rear corner of the
vehicle.
Remove the retaining wing bolt and lift it off the
mounting bracket.If you have a van with the 15-passenger seating
arrangement, the equipment you will need is secured on
the rear oor of the passenger side of the vehicle.
To access the equipment, remove the retaining wing
bolt and lift it out of the mounting bracket.
5-70

3. Pull the wheel toward the rear of the vehicle,
keeping the cable tight.
4. With the UP side facing you, attach the ratchet to
the wheel wrench.
5. Put the at end of the wheel wrench on an angle
through the hole in the rear door frame, above the
bumper.6. Raise the tire fully against the underside of the
vehicle. Continue turning the ratchet until the tire
is secure and the cable is tight. The spare tire hoist
cannot be overtightened.
7. Make sure the tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If the tire
moves, use the ratchet to tighten the cable.
You will hear two clicks when the tire is up all the way.
Return the jacking equipment to the proper location.
Secure the items and replace the jack cover.
Spare Tire
Your vehicle, when new, had a fully inated spare tire.
A spare tire may lose air over time, so check its
ination pressure regularly. SeeInation - Tire Pressure
on page 5-58andLoading Your Vehicle on page 4-31
for information regarding proper tire ination and loading
your vehicle. For instructions on how to remove,
install or store a spare tire, seeRemoving the Flat Tire
and Installing the Spare Tire on page 5-73and
Storing a Flat or Spare Tire and Tools on page 5-82.
5-83

Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. SeeEngine
Coolant on page 5-22for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the windshield
washer tank and add the proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your tires and make sure tires are inated
to the correct pressures. Do not forget to check your
spare tire. SeeTires on page 5-52for further details.
Check to make sure the spare tire is stored securely.
Push, pull and then try to turn the spare tire. If it moves,
tighten it. SeeChanging a Flat Tire on page 5-68.
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 you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular
brake. SeeParking Brake on page 2-25if necessary.
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 starter
should work only in PARK (P) or NEUTRAL (N).
If the starter works in any other position, contact
your GM Goodwrench dealer for service.
6-11

Flat Tire Change:Installation of a spare tire will be
covered at no charge. The customer is responsible
for the repair or replacement of the tire if not
covered by a warrantable failure.
Jump Start:No-start occurrences which require a
battery jump start will be covered at no charge.
Dealer Locator Service
Trip Routing:Your Roadside Assistance
Representative can provide you with specic
information regarding this feature.
Trip Interruption Expense Benets:Your
Roadside Assistance Representative can provide
you with specic information regarding this feature.
In many instances, mechanical failures are covered
under GMC’s Bumper-to-Bumper warranty. However,
when other services are utilized, our Roadside
Assistance Representatives will explain any payment
obligations you might incur.
For prompt and efficient assistance when calling, please
provide the following to the Roadside Assistance
Representative:
Your name, home address, and home telephone
number.
Telephone number of your location.
Location of the vehicle.
Model, year, color, and license plate number of the
vehicle.
Mileage, Vehicle Identication Number (VIN) and
delivery date of the vehicle.
Description of the problem.
While we hope you never have the occasion to use our
service, it is added security while traveling for you
and your family. Remember, we are only a phone call
away. GMC Roadside Assistance: 1-800-462-8782, text
telephone (TTY) users, call 1-888-889-2438.
GMC reserves the right to limit services or
reimbursement to an owner or driver when, in GMC’s
judgement, the claims become excessive in frequency or
type of occurrence.
Roadside Assistance is not part of or included in the
coverage provided by the New Vehicle Limited Warranty.
GMC reserves the right to make any changes or
discontinue the Roadside Assistance program at any
time without notication.
7-7

C
California Fuel.................................................. 5-6
Canadian Owners................................................ ii
Capacities and Specications............................5-98
Carbon Monoxide...........................2-28, 4-26, 4-36
Care of
Safety Belts................................................5-87
Your Cassette Tape Player............................3-73
Your CD Player...........................................3-74
Your CDs ...................................................3-74
Cargo Door Relocking....................................... 2-8
Center High-Mounted Stoplamp (CHMSL)...........5-49
Center Passenger Position, Safety Belts.....1-23, 1-24
Chains, Tire...................................................5-67
Charging System Light....................................3-28
Check
Engine Light...............................................3-33
Gages Warning Light...................................3-39
Checking Things Under the Hood......................5-10
Chemical Paint Spotting...................................5-90
Child Restraints
Child Restraint Systems...............................1-40
Infants and Young Children...........................1-34
Lower Anchorages and Top Tethers for
Children (LATCH System)..........................1-50
Older Children.............................................1-31
Securing a Child Restraint Designed for the
LATCH System........................................1-52Child Restraints (cont.)
Securing a Child Restraint in a Center
Seat Position...................................1-54, 1-55
Securing a Child Restraint in a Rear
Outside Seat Position...............................1-52
Securing a Child Restraint in the Right Front
Seat Position...........................................1-56
Top Strap...................................................1-47
Top Strap Anchor Location............................1-48
Where to Put the Restraint...........................1-43
Chime Level Adjustment..................................3-74
Cigarette Lighter.............................................3-17
Cleaning
Aluminum Wheels........................................5-89
Exterior Lamps/Lenses.................................5-88
Fabric/Carpet..............................................5-85
Finish Care.................................................5-88
Glass Surfaces............................................5-86
Instrument Panel.........................................5-86
Interior Plastic Components...........................5-86
Tires..........................................................5-90
Underbody Maintenance...............................5-90
Vinyl..........................................................5-86
Washing Your Vehicle...................................5-87
Weatherstrips..............................................5-87
Windshield and Wiper Blades........................5-89
Climate Control System...................................3-18
Outlet Adjustment........................................3-20
3

Climate Control System (cont.)
Rear Air Conditioning and Heating System......3-22
Rear Heating System...................................3-21
Comfort Guides, Rear Safety Belt.....................1-28
Control of a Vehicle.......................................... 4-6
Coolant
Engine Temperature Gage............................3-32
Heater, Engine............................................2-22
Cooling System..............................................5-27
Cruise Control Lever.......................................3-10
Cruise Control Light........................................3-37
Customer Assistance Information
Courtesy Transportation.................................. 7-8
Customer Assistance for Text Telephone
(TTY) Users.............................................. 7-4
Customer Assistance Offices........................... 7-5
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-6
Reporting Safety Defects to General Motors....7-13
Reporting Safety Defects to the Canadian
Government............................................7-12
Reporting Safety Defects to the United States
Government............................................7-12
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-13D
Daytime Running Lamps..................................3-14
Daytime Running Lamps Indicator Light.............3-38
Defensive Driving............................................. 4-2
Doing Your Own Service Work........................... 5-4
Dome Lamp Override......................................3-15
Dome Lamps.................................................3-15
Door
60/40 Swing-Out Side Door...........................2-12
Cargo Door Relocking.................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Rear Door Security Locks............................... 2-8
Rear Doors.................................................2-14
Sliding Side Door........................................2-10
Driver
Position, Safety Belt.....................................1-15
Driving
At Night.....................................................4-16
City...........................................................4-21
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-22
Hill and Mountain Roads..............................4-24
In Rain and on Wet Roads...........................4-18
Rocking Your Vehicle to Get it Out.................4-30
Winter........................................................4-26
Dual Tire Operation.........................................5-60
4

I
Ignition Positions.............................................2-20
Infants and Young Children, Restraints...............1-34
Ination -- Tire Pressure..................................5-58
Instrument Panel
Brightness..................................................3-15
Cluster.......................................................3-24
Overview..................................................... 3-4
J
Jump Starting.................................................5-39
K
Keyless Entry System....................................... 2-3
Keys............................................................... 2-2
L
Labelling, Tire Sidewall....................................5-53
Lamps
Battery Run-Down Protection.........................3-16
Dome........................................................3-15
Dome Lamp Override...................................3-15
Exterior......................................................3-13
Reading.....................................................3-16
LATCH System
Child Restraints...........................................1-50
Securing a Child Restraint Designed
for
the LATCH System...................................1-52
Light
Airbag Off..................................................3-27
Airbag Readiness........................................3-26
Anti-Lock Brake System Warning...................3-31
Brake System Warning.................................3-29
7