Park on a fairly steep hill, with the vehicle facingdownhill. Keeping your foot on the regular brake,set the parking brake.• To check the parking brake’s holding ability:With the engine running and the transmissionin N (Neutral), slowly remove foot pressure fromthe regular brake pedal. Do this until the vehicleis held by the parking brake only.• To check the P (Park) mechanism’s holding ability:With the engine running, shift to P (Park). Thenrelease the parking brake followed by the regularbrake.Contact your dealer/retailer if service is required.Underbody Flushing ServiceAt least every spring, use plain water to flush anycorrosive materials from the underbody. Take careto clean thoroughly any areas where mud and otherdebris can collect.Recommended Fluids andLubricantsFluids and lubricants identified below by name, partnumber, or specification can be obtained from yourdealer/retailer.Usage Fluid/LubricantEngine OilThe engine requires a specialengine oil meeting GM StandardGM4718M. Oils meeting thisstandard can be identified assynthetic, and should also beidentified with the AmericanPetroleum Institute (API) Certifiedfor Gasoline Engines starburstsymbol. However, not all syntheticAPI oils with the starburst symbolwill meet this GM standard.Look for and use only oil that meetsGM Standard GM4718M. For theproper viscosity, see Engine Oilon page 5-13.Engine Coolant50/50 mixture of clean, drinkablewater and use only DEX-COOL®Coolant. See Engine Coolant onpage 5-23.6-11
