2007 GMC SAVANA fuel additives

Service........................................................ 286
Accessories and Modifications................... 286
California Proposition 65 Warning.............. 286
Doing Your Own Service Work.................. 287
Adding Equipment to the Outside
of Your Vehicle...................................... 287
Fuel............................................................. 288
Gasoline Octane........................................ 288
Gasoline Specifications.............................. 288
California Fuel........................................... 289
Additives................................................... 289
Fuel E85 (85% Ethanol)............................ 290
Fuels in Foreign Countries........................ 291
Filling the Tank......................................... 292
Filling a Portable Fuel Container............... 294
Checking Things Under the Hood.............. 294
Hood Release........................................... 295
Engine Compartment Overview.................. 296
Engine Oil (Gasoline Engine).................... 297Engine Oil Life System
(Gasoline Engine).................................. 300
Engine Air Cleaner/Filter............................ 302
Automatic Transmission Fluid.................... 303
Engine Coolant.......................................... 306
Radiator Pressure Cap.............................. 309
Engine Overheating................................... 309
Cooling System......................................... 311
Engine Fan Noise..................................... 317
Power Steering Fluid ................................. 317
Windshield Washer Fluid........................... 318
Brakes...................................................... 319
Battery...................................................... 323
Jump Starting............................................ 324
All-Wheel Drive........................................... 330
Rear Axle.................................................... 331
Front Axle................................................... 331
Section 5 Service and Appearance Care
283

Fuel
If your vehicle has a diesel engine, see “Diesel
Fuel Requirements and Fuel System” in the
DURAMAX
®Diesel Supplement.
For vehicles with gasoline engines, please
read this.
Gasoline
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle. To
help keep your engine clean and maintain optimum
vehicle performance, GM recommends the use
of gasoline advertised as TOP TIER Detergent
Gasoline.
The 8th digit of your Vehicle Identification
Number (VIN) shows the code letter or number
that identifies your engine. You will find the VIN at
the top left of the instrument panel. SeeVehicle
Identication Number (VIN) on page 386.
If your vehicle has the 5.3L V8 engine
(VIN Code Z), you may use either regular
unleaded gasoline or ethanol fuel containing
up to 85% ethanol (E85); also seeFuel E85
(85% Ethanol) on page 290. In all other gasoline
engines, use only regular unleaded gasoline.
Gasoline Octane
Use regular unleaded gasoline with a posted
octane rating of 87 or higher. If the octane rating
is less than 87, you may 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, your 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 289for additional information.
288

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.
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 your fuel system and also damage
the plastic and rubber parts. That damage
would not be covered under your warranty.
289

To ensure quick starts in the wintertime, the
E85 fuel must be formulated properly for your
climate according to ASTM specification D 5798.
If you have trouble starting on E85, it may be
because your E85 fuel is not properly formulated
for your climate. If this happens, switching to
gasoline or adding gasoline to your fuel tank may
improve starting. For good starting and heater
efficiency below 32°F (0°C), the fuel mix in the fuel
tank should contain no more than 70% ethanol.
It is best not to alternate repeatedly between
gasoline and E85. If you do switch fuels, it
is recommended that you add as much fuel as
possible — do not add less than three gallons
(11 L) when refueling. You should drive the
vehicle immediately after refueling for at least
seven miles (11 km) to allow the vehicle to adapt
to the change in ethanol concentration.
E85 has less energy per gallon than gasoline, so
you will need to refill your fuel tank more often
when using E85 than when you are using gasoline.
SeeFilling the Tank on page 292.Notice:Some additives are not compatible
with E85 fuel and may harm your vehicle’s fuel
system. 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 your fuel system and also damage
the 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 may
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.
291

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 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. See
Recommended Fluids and Lubricants on
page 409for more information.
307

A
Accessories and Modifications..................... 286
Accessory Power Outlet(s).......................... 158
Adding Equipment to Your
Airbag-Equipped Vehicle............................ 97
Additives, Fuel............................................ 289
Add-On Electrical Equipment....................... 387
Air Cleaner/Filter, Engine............................. 302
Air Conditioning........................................... 159
Airbag
Off Light.................................................. 170
Passenger Status Indicator....................... 172
Readiness Light....................................... 169
Airbag Sensing and Diagnostic
Module (SDM).......................................... 430
Airbag System............................................... 78
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?.................. 84Airbag System (cont.)
What Will You See After an
Airbag Inflates?...................................... 84
When Should an Airbag Inflate?................. 82
Where Are the Airbags?............................. 80
All-Wheel Drive........................................... 330
All-Wheel-Drive (AWD) System.................... 238
AM-FM Radio.............................................. 189
Antenna, Fixed Mast................................... 226
Anti-Lock Brake System (ABS).................... 233
Anti-Lock Brake, System Warning Light....... 176
Appearance Care
Aluminum Wheels.................................... 382
Care of Safety Belts................................ 380
Chemical Paint Spotting........................... 384
Cleaning Exterior Lamps/Lenses.............. 381
Cleaning the Inside of Your Vehicle.......... 377
Fabric/Carpet........................................... 378
Finish Care.............................................. 381
Finish Damage......................................... 383
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 379
Sheet Metal Damage............................... 383
Tires........................................................ 383
Underbody Maintenance........................... 384
439

F
Filter
Engine Air Cleaner................................... 302
Finish Damage............................................ 383
Fixed Mast Antenna.................................... 226
Flashers, Hazard Warning........................... 146
Flash-to-Pass.............................................. 149
Flat Tire...................................................... 360
Flat Tire, Changing...................................... 360
Flat Tire, Storing......................................... 375
Fluid
Automatic Transmission............................ 303
Power Steering........................................ 317
Windshield Washer.................................. 318
Front Axle................................................... 331
Fuel............................................................ 288
Additives.................................................. 289
California Fuel.......................................... 289
E85 (85% Ethanol)................................... 290
Filling a Portable Fuel Container.............. 294
Filling Your Tank...................................... 292
Fuels in Foreign Countries....................... 291
Gage....................................................... 186
Gasoline Octane...................................... 288
Gasoline Specifications............................ 288
Regulator................................................. 124Fuses
Engine Compartment Fuse Block............. 390
Floor Console Fuse Block........................ 388
Fuses and Circuit Breakers...................... 387
Windshield Wiper..................................... 387
G
Gage
Check Gages Warning Light..................... 185
Engine Coolant Temperature.................... 178
Fuel......................................................... 186
Oil Pressure............................................. 182
Speedometer........................................... 168
Voltmeter Gage........................................ 175
Gasoline
Octane..................................................... 288
Specifications........................................... 288
GM Mobility Reimbursement Program.......... 423
H
Hazard Warning Flashers............................ 146
Headlamp Wiring......................................... 387
444