Fuel
Top Tier Fuel
GM recommends the use of TOP TIER Detergent Gasoline to keep the engine clean, reduce engine deposits, and maintain optimal vehicle performance. Look for the TOP TIER Logo or see www.toptiergas.com for a list of TOP TIER Detergent Gasoline marketers and applicable countries.
Recommended Fuel (LFX 3.6L V6 Engine)
Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume. Use regular unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 87 or higher. Do not use gasoline with a posted octane rating of less than 87, as this may cause engine knock and will lower fuel economy.
Recommended Fuel (LF3 3.6L Twin Turbo V6 Engine)
Do not use any fuel labeled E85 or FlexFuel. Do not use gasoline with ethanol levels greater than 15% by volume. Use premium unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 93. If unavailable, unleaded gasoline with a posted octane rating of 91 may be used, but with reduced performance
DRIVING AND OPERATING 227 and fuel economy. If the octane is less than 91, the engine could be damaged and the repairs would not be covered by the vehicle warranty. If heavy knocking is heard when using gasoline rated at 93 octane, the engine needs service.
Prohibited Fuels
Caution
Do not use fuels with any of the following conditions; doing so may damage the vehicle and void its warranty: . For vehicles that are not
FlexFuel, fuel labeled greater than 15% ethanol by volume, such as mid-level ethanol blends (16–50% ethanol), E85, or FlexFuel.
. Fuel with any amount of methanol, methylal, ferrocene, and aniline. These fuels can
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Caution (Continued)
corrode metal fuel system parts or damage plastic and rubber parts.
. Fuel containing metals such as methylcyclopentadienyl manganese tricarbonyl (MMT), which can damage the emissions control system and spark plugs.
. Fuel with a posted octane rating of less than the recommended fuel. Using this fuel will lower fuel economy and performance, and may decrease the life of the emissions catalyst.
Fuels in Foreign Countries
The U.S., Canada, and Mexico post fuel octane ratings in anti-knock index (AKI). For fuel not to use in a foreign country, see Prohibited Fuels 0 227.
Fuel Additives
TOP TIER Detergent Gasoline is highly recommended for use with your vehicle. If your country does not have TOP TIER Detergent Gasoline, add ACDelco Fuel System Treatment Plus −Gasoline to the vehicle’s gasoline fuel tank at every oil change or 15,000 km (9,000 mi), whichever occurs first. TOP TIER Detergent Gasoline and ACDelco Fuel System Treatment Plus−Gasoline will help keep your vehicle’s engine fuel deposit free and performing optimally.
Filling the Tank
{ Warning
Fuel vapors and fuel fires burn violently and can cause injury or death.
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228 DRIVING AND OPERATING
Warning (Continued)
Follow these guidelines: . To help avoid injuries to you
and others, read and follow all the instructions on the fuel pump island.
. Turn off the engine when refueling.
. Keep sparks, flames, and smoking materials away from fuel.
. Do not leave the fuel pump unattended.
. Avoid using electronic devices while refueling.
. Do not reenter the vehicle while pumping fuel.
. Keep children away from the fuel pump and never let children pump fuel.
. Fuel can spray out if the refueling nozzle is inserted too quickly. This spray can happen if the tank is nearly full, and is more likely in hot weather. Insert the refueling nozzle slowly and wait for any hiss noise to stop prior to beginning to flow fuel.
To open the fuel door, push and release the rearward center edge of the door.
The vehicle has a capless refueling system and does not have a fuel cap. The filling nozzle must be fully inserted and latched prior to starting fuel flow.
{ Warning
Overfilling the fuel tank by more than three clicks of a standard fill nozzle may cause: . Vehicle performance issues,
including engine stalling and damage to the fuel system.
. Fuel spills.
. Potential fuel fires.
Be careful not to spill fuel. Wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Exterior Care 0 312.
DRIVING AND OPERATING 229
{ Warning
If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.
Filling the Tank with a Portable Gas Can
If the vehicle runs out of fuel and must be filled from a portable gas can:
1. Locate the capless funnel adapter from under the carpet in the trunk. If this is a professional vehicle, see the Coachbuilder’s Owner Manual for funnel adapter location.
2. Insert and latch the funnel into the capless fuel system.
{ Warning
Attempting to refuel without using the funnel adapter may cause fuel spillage and damage the capless fuel system. This could cause a fire and you or others could be badly burned and the vehicle could be damaged.
3. Remove and clean the funnel adapter and return to the storage location.
Filling a Portable Fuel Container
{ Warning
Never fill a portable fuel container while it is in the vehicle. Static electricity discharge from the container can ignite the fuel vapor.
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Warning (Continued)
You can be badly burned and the vehicle damaged if this occurs. To help avoid injury to you and others: . Dispense fuel only into
approved containers. . Do not fill a container while
it is inside a vehicle, in a vehicle's trunk, pickup bed, or on any surface other than the ground.
. Bring the fill nozzle in contact with the inside of the fill opening before operating the nozzle. Contact should be maintained until the filling is complete.
. Do not smoke while pumping fuel.
. Avoid using electronic devices.
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