Cadillac 2010 DTS Owner's Manual page 182

The ACCs are located on the steering wheel.
The cruise control buttons are located on left side of the
steering wheel.
Press to turn the system on.
vehicle resume to a previously set speed or to increase
the set speed when ACC is already active.
Press to set the speed or to decrease the set
speed when ACC is already active.
Press to cancel ACC.
increase the distance between your vehicle and other
vehicles.
4-16
Press to make the
Press to
decrease the distance between your vehicle and other
vehicles.
ACC will not work if the master cylinder brake fluid level
is low.
If you leave your Adaptive Cruise Control switch
on when you are not using cruise, you might hit a
button and go into cruise when you do not want
to. You could be startled and even lose control.
Keep the Adaptive Cruise Control switch off until
you want to use cruise control.
The set speed is selected by the driver. This is the
speed your vehicle will travel if there is no vehicle
detected in its path.
To set ACC, do the following:
1. Press the button.
2. Get up to the speed desired.
3. Press in the SET button and release it.
4. Take your foot off the accelerator pedal.
Press to