If this occurs, use a gasoline rated at 87 octane orhigher as soon as possible. Otherwise, you coulddamage the engine. If heavy knocking is heard whenusing gasoline rated at 87 octane or higher, the engineneeds service.
Gasoline Specifications
At a minimum, gasoline should meet ASTM specificationD 4814 in the United States or CAN/CGSB-3.5 or3.511 in Canada. Some gasolines contain anoctane-enhancing additive called methylcyclopentadienylmanganese tricarbonyl (MMT). We recommendagainst the use of gasolines containing MMT. SeeAdditives on page 6-6for additional information.
California Fuel
If the vehicle is certified to meet California EmissionsStandards, it is designed to operate on fuels thatmeet California specifications. See the underhoodemission control label. If this fuel is not availablein states adopting California emissions standards, thevehicle will operate satisfactorily on fuels meeting federalspecifications, but emission control system performancemight be affected. The malfunction indicator lampcould turn on and the vehicle might fail asmog-check test.
SeeMalfunction Indicator Lamp on page 4-57. If thisoccurs, return to your authorized dealer/retailer fordiagnosis. If it is determined that the condition is causedby the type of fuel used, repairs might not be coveredby the vehicle warranty.
Additives
To provide cleaner air, all gasolines in the United Statesare now required to contain additives that help preventengine and fuel system deposits from forming, allowingthe emission control system to work properly. In mostcases, nothing should have to be added to the fuel.However, some gasolines contain only the minimumamount of additive required to meet U.S. EnvironmentalProtection Agency regulations. To help keep fuel injectorsand intake valves clean, or if the vehicle experiencesproblems due to dirty injectors or valves, look for gasolinethat is advertised as TOP TIER Detergent Gasoline.
For customers who do not use TOP TIER DetergentGasoline regularly, one bottle of GM Fuel SystemTreatment PLUS, added to the fuel tank at everyengine oil change, can help clean deposits from fuelinjectors and intake valves. GM Fuel System TreatmentPLUS is the only gasoline additive recommended byGeneral Motors.
Also, your dealer/retailer has additives that will helpcorrect and prevent most deposit-related problems.
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Spare Tire
This vehicle may have a spare tire, which, when new,was fully inflated. A spare tire may lose air over time, socheck its inflation pressure regularly. SeeInflation - TirePressure on page 6-54andLoading the Vehicle onpage 5-18for information regarding proper tire inflationand loading your vehicle. For instructions on how toremove, install or store a spare tire, seeRemoving theFlat Tire and Installing the Spare Tire on page 6-83.
After installing the spare tire on your vehicle, you shouldstop as soon as possible and make sure the spare iscorrectly inflated. Have the damaged or flat roadtire repaired or replaced as soon as you can andinstalled back onto your vehicle. This way, a spare tirewill be available in case you need it again.
Your vehicle may have a different size spare tire thanthe road tire originally installed on your vehicle.This spare tire was developed for use on your vehicle,so it is all right to drive on it.
If your vehicle has a spare tire that does not match yourvehicle’s original road tires and wheels in size andtype, do not include the spare in the tire rotation.
Appearance Care
Interior Cleaning
The vehicle’s interior will continue to look its best if it iscleaned often. Although not always visible, dust anddirt can accumulate on the upholstery. Dirt can damagecarpet, fabric, leather, and plastic surfaces. Regularvacuuming is recommended to remove particles from theupholstery. It is important to keep the upholstery frombecoming and remaining heavily soiled. Soils should beremoved as quickly as possible. The vehicle’s interiormay experience extremes of heat that could causestains to set rapidly.
Lighter colored interiors may require more frequentcleaning. Use care because newspapers and garmentsthat transfer color to home furnishings may alsotransfer color to the vehicle’s interior.
When cleaning the vehicle’s interior, only use cleanersspecifically designed for the surfaces being cleaned.Permanent damage may result from using cleaners onsurfaces for which they were not intended. Use glasscleaner only on glass. Remove any accidental over-sprayfrom other surfaces immediately. To prevent over-spray,apply cleaner directly to the cleaning cloth.
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