2004 CHEVROLET VENTURE ECU

If your tires have too much air (overination), you
can get the following:
Unusual wear
Bad handling
Rough ride
Needless damage from road hazards
When to Check
Check your tires once a month or more.
Also, check the tire pressure of the compact spare tire.
It should be at 60 psi (420 kPa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can’t tell if your tires are properly inated
simply by looking at them. Radial tires may look
properly inated even when they’re underinated.
Remove the valve cap from the tire valve stem. Press
the tire gage rmly onto the valve to get a pressure
measurement. If the cold tire ination pressure is low,
add air until you reach the recommended pressure
on the Certication/Tire label or the Tire and Loading
Information label.If you overll the tire, release air by pushing on the
metal stem in the center of the tire valve. Recheck the
tire pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
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 5-71andWheel Replacement
on page 5-74for more information.
Make sure the spare tire is stored securely. Push, pull
and then try to rotate or turn the tire. If the tire
moves, use the folding wrench to tighten the cable. See
“Storing the Spare Tire and Tools” underChanging a
Flat Tire on page 5-78.
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.
5-69

Notice:The wrong wheel can also cause problems
with bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper height,
vehicle ground clearance and tire or tire chain
clearance to the body and chassis.
SeeChanging a Flat Tire on page 5-78for more
information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can’t know how it’s been used
or how far it’s been driven. It could fail
suddenly and cause a crash. If you have to
replace a wheel, use a new GM original
equipment wheel.
Tire Chains
Notice:Use tire chains only where legal and only
when you must. Use only SAE Class “S” type chains
that are the proper size for your tires. Install them
on the front tires and 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.
5-75

4. Remove the protective cap covering the outlet.
5. Attach the other end of the hose to the outlet.
6. Press the accessory inator switch. The light in the
switch will come on to show the system is working.
If the accessory inator system does not turn on or the
light does not come on, the fuse may be blown or
installed incorrectly. SeeFuses and Circuit Breakers on
page 5-106or see your dealer for service.
Your accessory inator will automatically shut off after
about 10 minutes. The light in the switch will blink. After
about one minute you can use the system again.
Press the switch and the indicator light will come on.
Notice:If you run the accessory inator longer
than 30 minutes at a time, you could damage
the inator. The repairs would not be covered by
your warranty. Run the inator for short periods of
time only.After running the accessory inator for 30 minutes, wait
at least 10 minutes before restarting the accessory
inator.
To turn off the inator, do the following:
1. Press the switch and detach the hose, rst from
the inated object, then from the outlet.
2. Put the protective cap back on.
3. Place the inator kit tools in the pouch, and store in
the glove box.
To put the cap back on, line up the tabs at the back of
the cover and put it in place. Push down the tab to
secure the cap.
5-77

9. Tighten the wheel nuts
rmly in a crisscross
sequence, as shown.
{CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to come loose
and even come off. This could lead to an
accident. Be sure to use the correct wheel
nuts. If you have to replace them, be sure to
get new GM original equipment wheel nuts.
Stop somewhere as soon as you can and have
the nuts tightened with a torque wrench to the
proper torque specication. See “Capacities
and Specications” in the Index for wheel nut
torque specication.Notice:Improperly tightened wheel nuts can lead
to brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque specication. See “Capacities and
Specications” in the index for the wheel nut torque
specication.
10. Do not try to put a wheel cover on the compact
spare tire. It will not t. Store the wheel cover
securely in the rear of the vehicle until you have the
at tire repaired or replaced.
Notice:Wheel covers will not t on your compact
spare. If you try to put a wheel cover on the compact
spare, you could damage the cover or the spare.
5-90

Storing the Spare Tire and Tools
1. Lay the tire near the rear of the vehicle with the
valve stem down.
2. If the vehicle has aluminum wheels, remove the
small center cap by tapping the back of the cap
with the extension of the shaft.
3. Slide the cable retainer through the center of the
wheel and start to raise the tire.
Make sure the retainer is fully seated across the
underside of the wheel.
4. When the tire is almost in the stored position, turn
the tire so the valve is towards the rear of the
vehicle.
This will help when you check and maintain tire
pressure in the spare.
5. Raise the tire fully against the underside of the
vehicle. Continue turning the folding wrench until
you feel more than two clicks. This indicates that the
compact spare tire is secure and the cable is
tight. The spare tire hoist cannot be overtightened.A. Push and Pull
B. Turn Tire
6. Make sure the tire is stored securely. Push, pull,
and then try to turn the tire. If the tire moves, use
the folding wrench to tighten the cable.
Put back all tools as they were stored in the jack
storage compartment and put the compartment cover
back on.
5-92

To put the cover back on, line up the tabs on the right
of the cover with the slots in the cover opening. Push the
cover in place and push down the tab so that it rests
in the groove. This secures the cover in place.
A. Strap
B. Bag and ToolsC. JackStore the center cap or the plastic bolt-on wheel covers
until a full size tire is put back on the vehicle. When
you replace the compact spare with a full-size tire,
reinstall the bolt-on wheel covers or the center cap.
Hand-tighten them over the wheel nuts, using the folding
wrench.
Storing the Flat Tire on a Front-Wheel
Drive Vehicle
Follow the previously listed procedure for storing a
spare tire.
5-93

5. Hook the cable onto
the outside portion of
the liftgate hinges.
6. Pull on the cable to make sure it is secure.7. Make sure the metal
tube is centered at the
striker. Push the
tube towards the front
of the vehicle.
8. Close the liftgate and make sure that it is latched.
5-95

Fuse Usage
7Fuses (Instrument Panel): ABS
Module Battery, Cigarette Lighter,
Courtesy Lamps, Front Power
Socket, Power Locks, Power Mirrors
and Right Rear Power Socket,
OnStar, RAP
8Ignition Switch to Fuses (I/P): Body
Control Module Program, Front
Comfort Controls Low/Medium
Blower, Front Wiper/Washer,
HVAC/DRL, MALL/Radio/DIC,
Power Quarter Vent, Rear HVAC,
Rear Wiper/Washer. SWC
Accessory and Power Window
Circuit Breaker, RAP
18 Fuel Injectors 1–6
19 Not Used
20 Not Used
21Evaporative Emissions (EVAP)
Canister Purge Valve, Heated
Oxygen Sensors 1 and 2, Mass Air
Flow (MAF) SensorFuse Usage
22 Not Used
23 Not Used
24 Not Used
25 Ignition Control Module (ICM)
26 Not Used
27Transaxle Range Switch to Back-up
Lamps
28A/C Clutch Relay to A/C
Compressor Clutch Oil
29Driver Information Display, Heater
A/C Control, Radio, Rear (LH and
RH) Side Door Actuator Control
Motor, Remote Control Door Lock
Receiver (RCDLR), Security
Indicator Lamp and Theft-Deterrent
Shock Sensor
30 Generator
31Automatic Transaxle (Torque
Converter Clutch Solenoids)
Stoplamp Switch to Powertrain
Control Module
5-111