2007 CHEVROLET EXPRESS CARGO VAN fuel additives

Service........................................................ 290
Accessories and Modifications................... 290
California Proposition 65 Warning.............. 291
Doing Your Own Service Work.................. 291
Adding Equipment to the Outside of
Your Vehicle.......................................... 292
Fuel............................................................. 292
Gasoline Octane........................................ 293
Gasoline Specifications.............................. 293
California Fuel........................................... 293
Additives................................................... 294
Fuel E85 (85% Ethanol)............................ 295
Fuels in Foreign Countries........................ 296
Filling the Tank......................................... 297
Filling a Portable Fuel Container............... 299
Checking Things Under the Hood.............. 300
Hood Release........................................... 300
Engine Compartment Overview.................. 302
Engine Oil (Gasoline Engine).................... 303
Engine Oil Life System
(Gasoline Engine).................................. 306
Engine Air Cleaner/Filter............................ 308
Automatic Transmission Fluid.................... 309
Engine Coolant.......................................... 312Radiator Pressure Cap.............................. 315
Engine Overheating................................... 315
Cooling System......................................... 317
Engine Fan Noise..................................... 323
Power Steering Fluid................................. 323
Windshield Washer Fluid........................... 324
Brakes...................................................... 325
Battery...................................................... 329
Jump Starting............................................ 330
All-Wheel Drive........................................... 336
Rear Axle.................................................... 337
Front Axle................................................... 338
Noise Control System................................. 338
Tampering with Noise Control System
Prohibited.............................................. 338
Bulb Replacement....................................... 340
Halogen Bulbs........................................... 340
Headlamps................................................ 340
Front Turn Signal, Sidemarker and
Parking Lamps....................................... 342
Center High-Mounted Stoplamp (CHMSL) ... 342
Taillamps................................................... 343
Replacement Bulbs................................... 344
Section 5 Service and Appearance Care
287

Gasoline Octane
Use regular unleaded gasoline with a posted
octane rating of 87 or higher. If the octane rating
is less than 87, you might notice an audible
knocking noise when you drive, commonly referred
to as spark knock. If this occurs, use a gasoline
rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or
higher and you hear heavy knocking, the engine
needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM
specification D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 294for additional information.
California Fuel
If your vehicle is certified to meet California
Emissions Standards, it is designed to operate
on fuels that meet California specifications.
See the underhood emission control label.
If this fuel is not available in states adopting
California emissions standards, your vehicle will
operate satisfactorily on fuels meeting federal
specifications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 178. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the
type of fuel used, repairs may not be covered
by your warranty.
293

Additives
To provide cleaner air, all gasolines in the
United States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your
fuel. However, some gasolines contain only the
minimum amount of additive required to meet
U.S. Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves
clean, or if your vehicle experiences problems due
to dirty injectors or valves, look for gasoline that
is advertised as TOP TIER Detergent Gasoline.
Also, your dealer has additives that will help
correct and prevent most deposit-related problems.
Gasolines containing oxygenates, such as
ethers and ethanol, and reformulated gasolines
may be available in your area. General Motors
recommends that you use these gasolines if they
comply with the specifications described earlier.However, E85 (85% ethanol) and other fuels
containing more than 10% ethanol must not be
used in vehicles that were not designed for
those fuels.
Notice:Your vehicle was not designed for
fuel that contains methanol. Do not use
fuel containing methanol. It can corrode metal
parts in the fuel system and also damage
plastic and rubber parts. That damage would
not be covered under your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT.
General Motors recommends against the use of
such gasolines. Fuels containing MMT can reduce
the life of spark plugs and the performance of
the emission control system may be affected.
The malfunction indicator lamp may turn on.
If this occurs, return to your dealer for service.
294

E85 has less energy per gallon than gasoline, so
you will need to refill the fuel tank more often
when using E85 than when you are using gasoline.
SeeFilling the Tank on page 297.
Notice:Some additives are not compatible
with E85 fuel and can harm your vehicle’s fuel
system. Do not add anything to E85. Damage
caused by additives would not be covered
by your new vehicle warranty.
Notice:Your vehicle was not designed for
fuel that contains methanol. Do not use
fuel containing methanol. It can corrode metal
parts in the fuel system and also damage
plastic and rubber parts. That damage would
not be covered under your warranty.Fuels in Foreign Countries
If you plan on driving in another country outside
the United States or Canada, the proper fuel might
be hard to find. Never use leaded gasoline or
any other fuel not recommended in the previous
text on fuel. Costly repairs caused by use of
improper fuel would not be covered by your
warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business
in the country where you will be driving.
296

Notice:Using coolant other than
DEX-COOL®may cause premature engine,
heater core, radiator and fuel operated heater
(FOH) corrosion. In addition, the engine coolant
may require changing sooner, at 30,000 miles
(50 000 km) or 24 months, whichever occurs
rst. Any repairs would not be covered by your
warranty. Always use DEX-COOL
®(silicate-free)
coolant in your vehicle.
What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant which will
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can
boil before the proper coolant mixture will.
Your vehicle’s coolant warning system is
set for the proper coolant mixture.
CAUTION: (Continued)
CAUTION: (Continued)
With plain water or the wrong mixture, your
engine could get too hot but you would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and the proper coolant.
Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
If you have to add coolant more than four times
a year, have your dealer/retailer check your
cooling system.
Notice:If you use extra inhibitors and/or
additives in your vehicle’s cooling system,
you could damage your vehicle. Use only the
proper mixture of the engine coolant listed
in this manual for the cooling system.
SeeRecommended Fluids and Lubricants
on page 415for more information.
313

A
Accessories and Modifications..................... 290
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 97
Additives, Fuel............................................ 294
Add-On Electrical Equipment....................... 393
Air Cleaner/Filter, Engine............................. 308
Air Conditioning........................................... 160
Airbag
Off Light.................................................. 170
Passenger Status Indicator....................... 172
Readiness Light....................................... 169
Airbag System............................................... 78
What Will You See After an Airbag
Inflates?................................................. 84
When Should an Airbag Inflate?................. 82
Where Are the Airbags?............................. 80
Airbag Systems
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 97
Airbag Off Switch....................................... 86
How Does an Airbag Restrain?.................. 84
Passenger Sensing System....................... 89
Servicing Your Airbag-Equipped Vehicle..... 96
What Makes an Airbag Inflate?.................. 84All-Wheel Drive........................................... 336
All-Wheel-Drive (AWD) System.................... 238
AM-FM Radio.............................................. 190
Antenna, Fixed Mast................................... 226
Anti-Lock Brake System.............................. 233
Anti-Lock Brake, System Warning Light....... 176
Appearance Care
Aluminum Wheels.................................... 388
Care of Safety Belts................................ 385
Chemical Paint Spotting........................... 390
Cleaning Exterior Lamps/Lenses.............. 386
Cleaning the Inside of Your Vehicle.......... 382
Fabric/Carpet........................................... 384
Finish Care.............................................. 386
Finish Damage......................................... 389
Instrument Panel, Vinyl, and Other Plastic
Surfaces............................................... 385
Sheet Metal Damage............................... 389
Tires........................................................ 389
Underbody Maintenance........................... 390
Vehicle Care/Appearance Materials.......... 391
Washing Your Vehicle.............................. 386
Weatherstrips........................................... 385
Windshield and Wiper Blades................... 387
Ashtray....................................................... 159
445

Flash-to-Pass.............................................. 149
Flat Tire...................................................... 365
Flat Tire, Changing...................................... 366
Flat Tire, Storing......................................... 380
Fluid
Automatic Transmission............................ 309
Power Steering........................................ 323
Windshield Washer.................................. 324
Front Axle................................................... 338
Fuel............................................................ 292
Additives.................................................. 294
California Fuel.......................................... 293
E85 (85% Ethanol)................................... 295
Filling a Portable Fuel Container.............. 299
Filling Your Tank...................................... 297
Fuels in Foreign Countries....................... 296
Gage....................................................... 186
Gasoline Octane...................................... 293
Gasoline Specifications............................ 293
Regulator................................................. 123
Fuses
Engine Compartment Fuse Block............. 395
Floor Console Fuse Block........................ 394
Fuses and Circuit Breakers...................... 393
Windshield Wiper..................................... 393G
Gage
Check Gages Warning Light..................... 185
Engine Coolant Temperature.................... 178
Fuel......................................................... 186
Oil Pressure............................................. 182
Speedometer........................................... 168
Voltmeter Gage........................................ 175
Gasoline
Octane..................................................... 293
Specifications........................................... 293
GM Mobility Reimbursement Program.......... 429
H
Hazard Warning Flashers............................ 146
Headlamp Wiring......................................... 393
Headlamps.................................................. 340
Bulb Replacement.................................... 340
Daytime Running Lamps.......................... 156
Exterior Lamps......................................... 155
Flash-to-Pass........................................... 149
Front Turn Signal, Sidemarker and
Parking Lamps..................................... 342
450