Hummer 2004 H2 - 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.
• 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.
Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number or specification may be obtained from your GM
Goodwrench dealer.
Usage Fluid/Lubricant
Engine Oil
Engine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certified for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, see Engine Oil on
page 5-14.
Engine Coolant
50/50 mixture of clean, drinkable
water and use only
DEX-COOL
® Coolant. See Engine
Coolant on page 5-24.
Hydraulic Brake
System
Delco Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer Solvent
GM Optikleen ® Washer Solvent.
Power Steering
System
GM Power Steering Fluid (GM Part
No. U.S. 89021184, in Canada
89021186).
6-12