check engine CHEVROLET EXPRESS CARGO VAN 2007 1.G Workshop Manual

Scheduled Maintenance
(Gasoline Engine)
This maintenance section applies to vehicles with
a gasoline engine. If your vehicle has a diesel
engine, see the maintenance schedule section in
the DURAMAX
®Diesel Engine Supplement.
When the change engine oil light comes on, it
means that service is required for your vehicle.
Have your vehicle serviced as soon as possible
within the next 600 miles (1 000 km). It is possible
that, if you are driving under the best conditions, the
engine oil life system may not indicate that vehicle
service is necessary for over a year. However, your
engine oil and filter 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.If the engine oil life system is ever reset
accidentally, you must service your vehicle within
3,000 miles (5 000 km) since your last service.
Remember to reset the oil life system whenever
the oil is changed. SeeEngine Oil Life System
(Gasoline Engine) on page 306for information
on the Engine Oil Life System and resetting the
system.
When the change engine oil light appears, certain
services, checks, and inspections are required.
Required services are described in the following
for “MaintenanceI” and “MaintenanceII.”
Generally, it is recommended that your first
service be MaintenanceI, your second service
be MaintenanceII, and that you alternate
MaintenanceIand MaintenanceIIthereafter.
However, in some cases, MaintenanceIImay
be required more often.
405

MaintenanceI— Use MaintenanceIif the
change engine oil light comes on within 10 months
since the vehicle was purchased or MaintenanceII
was performed.MaintenanceII— Use MaintenanceIIif the
previous service performed was MaintenanceI.
Always use MaintenanceIIwhenever the message
comes on 10 months or more since the last
service or if the message has not come on at
all for one year.
Scheduled Maintenance
Service MaintenanceIMaintenanceII
Change engine oil and filter. SeeEngine Oil (Gasoline Engine) on page 303.
Reset oil life system. SeeEngine Oil Life System (Gasoline Engine) on
page 306.An Emission Control Service.••
Lubricate chassis components.See footnote #.••
Visually check for any leaks or damage.See footnote (j).••
Inspect engine air cleaner filter. If necessary, replace filter. SeeEngine
Air Cleaner/Filter on page 308.See footnote (l).•
Rotate tires and check inflation pressures and wear. SeeTire Inspection and
Rotation on page 356and “Tire Wear Inspection” inAt Least Once a Month
on page 412.••
Inspect brake system.See footnote (a).••
406

Scheduled Maintenance (cont’d)
Service MaintenanceIMaintenanceII
Check engine coolant and windshield washer fluid levels and add fluid 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).•
Check transmission fluid level and add fluid as needed.•
Inspect shields, vehicles with GVWR above 10,000 lbs (4 536 kg) only.
See footnote (g).•
Inspect throttle system.See footnote (m).•
407

(i)Drain, ush, and rell cooling system. This
service can be complex; you should have
your dealer/retailer perform this service. See
Engine Coolant on page 312 for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap, and ller neck. Pressure test the cooling
system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
(k)Inspect system. Check all fuel and vapor lines
and hoses for proper hook-up, routing, and
condition. Check that the purge valve works
properly, if equipped. Replace as needed.
(l)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(m)Check system for interference or binding and
for damaged or missing parts. Replace parts
as needed. Replace any components that have
high effort or excessive wear. Do not lubricate
accelerator or cruise control cables.
(n)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.Owner Checks and Services
These owner checks and services should be
performed at the intervals specified to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any fluids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 415.
At the First 100, 1,000 and 6,000 Miles
(160, 1 600 and 10 000 km)
For vehicles with dual wheels, check dual wheel
nut torque. For proper torque, seeCapacities
and Specications on page 398.
411

At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. SeeEngine Oil (Gasoline Engine)
on page 303for further details.
Notice:It is important to check the engine
oil regularly and keep it at the proper
level. Failure to keep the engine oil at the
proper level can cause damage to the engine
not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 312for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in
the windshield washer fluid reservoir and add
the proper fluid if necessary.
At Least Once a Month
Tire Ination Check
Inspect your vehicle’s tires and make sure they
are inflated to the correct pressures. Do not forget
to check the spare tire. SeeInation - Tire
Pressure on page 354. Check to make sure the
spare tire is stored securely. SeeChanging a Flat
Tire on page 366.
Tire Wear Inspection
Tire rotation may be required for high mileage
highway drivers prior to the Engine Oil Life System
service notification. Check the tires for wear
and, if necessary, rotate the tires. SeeTire
Inspection and Rotation on page 356.
412

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 128.
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 PARK (P) or
NEUTRAL (N). If the vehicle starts in any
other position, contact your GM Goodwrench
®
dealer 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 you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. SeeParking
Brake on page 128.
Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the ignition to RUN,
but do not start the engine. Without applying
the regular brake, try to move the shift
lever out of PARK (P) with normal effort. If the
shift lever moves out of PARK (P), contact
your GM Goodwrench
®dealer for service.
413

Ignition Transmission Lock Check
While parked, and with the parking brake set,
try to turn the ignition to LOCK in each shift
lever position.
•The ignition should turn to LOCK only when
the shift lever is in PARK (P).
•The ignition key should come out only in LOCK.
Contact your GM Goodwrench®dealer if service
is required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your
vehicle could begin to move. You or others
could be injured and property could be
damaged. Make sure there is room in front
of your 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 transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
•To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your GM Goodwrench
®dealer if service
is required.
Underbody Flushing Service
At least every spring, use plain water to flush
any corrosive materials from the underbody.
Take care to clean thoroughly any areas where
mud and other debris can collect.
414

Current and Past Model Order Forms
Technical Service Bulletins and Manuals are
available for current and past model GM vehicles.
To request an order form, specify year and
model name of the vehicle.
ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM - 6:00 PM
Eastern Time
For Credit Card Orders Only
(VISA-MasterCard-Discover), visit Helm, Inc.
on the World Wide Web at: www.helminc.com
Or you can write to:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207
Prices are subject to change without notice and
without incurring obligation. Allow ample time
for delivery.
Note to Canadian Customers: All listed prices
are quoted in U.S. funds. Canadian residents
are to make checks payable in U.S. funds.
Vehicle Data Recording
and Privacy
Your GM vehicle has a number of sophisticated
computers that record information about the
vehicle’s performance and how it is driven.
For example, your vehicle uses computer modules
to monitor and control engine and transmission
performance, to monitor the conditions for
airbag deployment and deploy airbags in a crash
and, if so equipped, to provide anti-lock braking
to help the driver control the vehicle. These
modules may store data to help your dealer/retailer
technician service your vehicle. Some modules
may also store data about how you operate
the vehicle, such as rate of fuel consumption
or average speed. These modules may also retain
the owner’s personal preferences, such as radio
pre-sets, seat positions, and temperature settings.
441

Capacities and Specifications...................... 398
Carbon Monoxide......................132, 256, 269
Care of
Safety Belts............................................. 385
Your Cassette Tape Player....................... 224
Your CD Player........................................ 226
Your CDs ................................................. 225
Cargo Door Relocking................................. 109
Center High-Mounted Stoplamp (CHMSL).... 342
Center Passenger Position, Safety
Belts................................................... 33, 34
Chains, Tire................................................. 364
Charging System Light................................ 174
Check
Engine Light............................................ 178
Gages Warning Light............................... 185
Checking Things Under the Hood................ 300
Chemical Paint Spotting.............................. 390
Child Restraints
Child Restraint Systems............................. 47
Infants and Young Children........................ 44
Lower Anchors and Tethers for Children..... 54
Older Children........................................... 41
Securing a Child Restraint in a Center
Seat Position.......................................... 66Child Restraints (cont.)
Securing a Child Restraint in a Rear
Outside Seat Position or the Second
Row Center Seat Position...................... 63
Securing a Child Restraint in the Right
Front Seat Position.......................... 68, 72
Where to Put the Restraint........................ 52
Chime Level Adjustment.............................. 226
Cigarette Lighter.......................................... 159
Cleaning
Aluminum Wheels.................................... 388
Exterior Lamps/Lenses............................. 386
Fabric/Carpet........................................... 384
Finish Care.............................................. 386
Inside of Your Vehicle.............................. 382
Instrument Panel, Vinyl, and Other Plastic
Surfaces............................................... 385
Tires........................................................ 389
Underbody Maintenance........................... 390
Washing Your Vehicle.............................. 386
Weatherstrips........................................... 385
Windshield and Wiper Blades................... 387
Climate Control System............................... 160
Outlet Adjustment..................................... 162
Rear Air Conditioning and Heating
System................................................. 164
Rear Heating System............................... 163
447

Driving
At Night................................................... 244
City.......................................................... 249
Defensive................................................. 228
Drunken................................................... 229
Freeway................................................... 250
Hill and Mountain Roads.......................... 254
In Rain and on Wet Roads...................... 246
Rocking Your Vehicle to Get it Out.......... 260
Winter...................................................... 256
Dual Tire Operation..................................... 355
E
EDR ............................................................ 441
Electrical System
Add-On Equipment................................... 393
Engine Compartment Fuse Block............. 395
Floor Console Fuse Block........................ 394
Fuses and Circuit Breakers...................... 393
Headlamp Wiring..................................... 393
Windshield Wiper Fuses........................... 393
Engine
Air Cleaner/Filter...................................... 308
Change Engine Oil Light.......................... 183
Check and Service Engine Soon Light..... 178
Coolant.................................................... 312Engine (cont.)
Coolant Heater......................................... 123
Coolant Temperature Gage...................... 178
Drive Belt Routing.................................... 418
Engine Compartment Overview................ 302
Exhaust................................................... 132
Fan Noise................................................ 323
Fuel Regulator......................................... 123
Oil ........................................................... 303
Oil Life System........................................ 306
Overheating............................................. 315
Reduced Power Light............................... 184
Running While Parked............................. 133
Starting.................................................... 122
Entry Lighting.............................................. 158
Event Data Recorders................................. 442
Exit Lighting................................................ 158
Extender, Safety Belt..................................... 40
Exterior Lamps............................................ 155
F
Filter
Engine Air Cleaner................................... 308
Finish Damage............................................ 389
Fixed Mast Antenna.................................... 226
Flashers, Hazard Warning........................... 146
449