2011 Buick Lucern Owner's Manual - Page 412

Parking Brake and Automatic Transmission P (Park) Mechanism Check Recommended Fluids and Lubricants Fluids and lubricants identified below by name, part number, or specification can be obtained from your dealer. Usage Fluid/Lubricant The engine requires engine oil approved to the dexos specification. Oils meeting this specification can be identified with the dexos certification mark. Look for and use only an engine oil that displays the dexos certification mark of the proper viscosity grade. See Engine Oil on page 6 ‑ 18 . { WARNING: When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move. Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. . Engine Oil To check the parking brake's holding ability: With the engine running and the transmission in N (Neutral), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only. To check the P (Park) mechanism's holding ability: With the engine running, shift to P (Park). Then release the parking brake followed by the regular brake. 50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant. See Engine Coolant Engine Coolant (4.6L Engine) on page 6 ‑ 28 or Engine Coolant (3.9L Engine) on page 6 ‑ 31 . DOT 3 Hydraulic Brake Fluid Hydraulic Brake (GM Part No. 88862806, in System Canada 88862807). . Contact your dealer if service is required. 7-8