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 transmission inNEUTRAL (N), slowly remove foot pressure fromthe regular brake pedal. Do this until the vehicle isheld by the parking brake only.• To check the PARK (P) mechanism’s holding ability:With the engine running, shift to PARK (P).Then release the parking brake followed by theregular brake.Contact your GM Goodwrench dealer if service isrequired.Underbody Flushing ServiceAt least every spring, use plain water to flush anycorrosive materials from the underbody. Take care toclean thoroughly any areas where mud and other debriscan collect.Recommended Fluids andLubricantsFluids and lubricants identified below by name, partnumber or specification may be obtained from yourdealer.Usage Fluid/LubricantEngine OilThe engine requires a specialengine oil meeting GM StandardGM4718M. Oils meeting thisstandard may be identified assynthetic, and should also beidentified with the AmericanPetroleum Institute Certified forGasoline Engines starburst symbol.However, not all synthetic API oilswith the starburst symbol will meetthis GM standard. You shouldlook for and use only an oil thatmeets GM Standard GM4718M.GM Goodwrench oil meets all therequirements for your vehicle.For the proper viscosity,see Engine Oil on page 5-16.Engine Coolant50/50 mixture of clean, drinkablewater and use only DEX-COOL®Coolant. See Engine Coolant onpage 5-24.6-11
