GMC 2005 T-Series Owner's Manual page 76

Resuming a Set Speed
Suppose you set your cruise control at a desired speed
and then you apply the brake or the clutch. This, of
course, shuts off the cruise control. But you don't need
to reset it.
Using the accelerator pedal, increase your vehicle's
speed to 25 mph (40 km/h) or more. The cruise control
does not work below this speed.
Turn the band on the lever to the RESUME (U.S.) or
+ RES (Canada) position and release it. Your vehicle will
accelerate to the previously set speed.
Increasing Speed While Using Cruise
Control
There are two ways to go to a higher speed:
•
Use the accelerator pedal to get to the higher
speed. Press the set (U.S.) or SET (Canada) button,
then release the button and the accelerator pedal.
You will now cruise at the higher speed.
•
Turn the band on the multifunction lever to the
RESUME (U.S.) or + RES (Canada) position. Hold it
there until you get up to the speed you want, and
then release it. To increase your speed in very small
amounts, turn the band on the multifunction lever
to the RESUME (U.S.) or + RES (Canada) position
and release it. Each time you do this, your vehicle
will go about 1 mph (1.6 km/h) faster.
3-12
Reducing Speed While Using Cruise
Control
Press the set (U.S.) or SET (Canada) button until you
reach the lower speed you want, then release it.
To slow down in very small amounts, tap the button
briefly. Each time you do this, you'll go about 1 mph
(1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase your speed.
When you take your foot off the pedal, your vehicle will
slow down to the cruise control speed you set earlier.
Using Cruise Control on Hills
The use of cruise control in mountainous or hilly areas
is not recommended.