GMC 2007 Envoy - Manual (Page 177)

{ CAUTION:
If you leave your cruise control 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 cruise control
switch off until you want to use cruise
control.
Setting Cruise Control
1. Move the cruise control switch to on.
2. Get up to the speed you want.
3. Press the set button at the end of the lever
and release it.
4. Take your foot off the accelerator pedal.
The accelerator pedal will not go down.
Some vehicles have a
cruise light on the
instrument panel cluster
that will come on
when the cruise control
is engaged.
Resuming a Set Speed
Suppose you set your cruise control at a desired
speed and then you apply the brake. This, of
course, shuts off the cruise control. But you do not
need to reset it.
Once you are going about 25 mph (40 km/h) or
more, you can move the cruise control switch
briefly from on to resume/accelerate.
You will go right back up to the previously chosen
speed and stay there.
If you hold the switch at resume/accelerate, the
vehicle keeps going faster until you release
the switch or apply the brakes. So unless you
want to go faster, do not hold the switch at
resume/accelerate.
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