GMC 2007 Sierra - Manual (Page 629)

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
This maintenance section applies to vehicles with
a gasoline engine. If your vehicle has a diesel
engine, see the maintenance schedule section in
the DURAMAX
® Diesel Engine Supplement.
Fluids and lubricants identified below by name,
part number, or specification may be obtained from
your 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.
GM Goodwrench
® oil meets all the
requirements for your vehicle. To
determine the proper viscosity for
your vehicle’s engine, see Engine
Oil (Gasoline Engine) on page 486.
Engine Coolant
50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
coolant. See Engine Coolant on
page 502.
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