Locking Rear Axle; All-Wheel Drive (Awd) System; Steering - GMC Sierra Denali 2009 Owner's Manual

If cruise control is being used when the system activates,
the StabiliTrak light will flash and cruise control will
automatically disengage. Cruise control may be
reengaged when road conditions allow. See Cruise
Control on page 3-10.
StabiliTrak may also turn off automatically if it determines
that a problem exists with the system. If the problem does
not clear itself after restarting the vehicle, see your
dealer/retailer for service.

Locking Rear Axle

Vehicles with a locking rear axle can give more traction
on snow, mud, ice, sand or gravel. It works like a
standard axle most of the time, but when traction is low,
this feature will allow the rear wheel with the most
traction to move the vehicle.

All-Wheel Drive (AWD) System

If the vehicle has this feature, engine power is sent to
all four wheels when extra traction is needed. This is like
four-wheel drive, but there is no separate lever or
switch to engage or disengage the front axle. It is fully
automatic, and adjusts itself as needed for road
conditions.

Steering

Power Steering
If power steering assist is lost because the engine stops
or the system is not functioning, the vehicle can be
steered but it will take more effort.
Steering Tips
It is important to take curves at a reasonable speed.
Traction in a curve depends on the condition of the tires
and the road surface, the angle at which the curve is
banked, and vehicle speed. While in a curve, speed is
the one factor that can be controlled.
If there is a need to reduce speed, do it before entering
the curve, while the front wheels are straight.
Try to adjust the speed so you can drive through the
curve. Maintain a reasonable, steady speed. Wait
to accelerate until out of the curve, and then accelerate
gently into the straightaway.
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