GMC 2009 Sierra - Manual (Page 440)

• To check the parking brake’s holding ability:
With the engine running and the 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 dealer/retailer 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 can be obtained from your
dealer/retailer.
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 5-13.
Engine Coolant
50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. See Engine Coolant on
page 5-23.
Hydraulic Brake
System
Delco ® Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer
Optikleen ® Washer Solvent.
Power Steering
System
GM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
Transmission
DEXRON ® -VI Automatic
Transmission Fluid.
6-12