2004 Hummer H2 Owner's Manual - Page 438

Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake. Recommended Fluids and Lubricants Fluids and lubricants identified below by name, part number or specification may be obtained from your GM Goodwrench dealer. Fluid/Lubricant Engine oil which meets GM Standard GM6094M and displays the American Petroleum Institute Certified for Gasoline Engines Engine Oil starburst symbol. To determine the proper viscosity for your vehicle's engine, see Engine Oil on page 5-14. 50/50 mixture of clean, drinkable Engine Coolant water and use only DEX-COOL® Coolant. See Engine Coolant on page 5-24. Hydraulic Brake Delco Supreme 11 Brake Fluid or System equivalent DOT-3 brake fluid. Windshield ® Washer Solvent GM Optikleen Washer Solvent. Power Steering Power Steering GM U.S. 89021184, Fluid (GM Part No. in Canada System 89021186). Usage • To check the parking brake's holding ability: With the engine running and transmission in NEUTRAL (N), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held 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 the regular brake. Contact your GM Goodwrench dealer if service is required. Underbody Flushing Service At least every spring, use plain water to flush any corrosive materials from the underbody. Take care to clean thoroughly any areas where mud and other debris can collect. 6-12