GMC 1996 Sonoma Owner's Manual page 86

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
cruise control. But you don't need to reset it.
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.....
Once you're going about
25 mph (40 km/h) or more,
you can move the cruise
control switch from ON to
R/A for about a 1/2 second.
You'll go right back up to your chosen speed and
stay there.
Remember, if you hold the switch at R/A longer than
a
112 second, the vehicle will keep going faster until you
release the switch or apply the brake. You could be
startled and even lose control. So unless you want
to go
faster, don't hold the switch at R/A.
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 button at the end of the lever, then release
the button and the accelerator pedal. You'll now
cruise at the higher speed.
Move the cruise switch from ON
to
R/A. Hold it
there until you get up to the speed you want, and
then release the switch. To increase your speed in
very small amounts, move the switch to R/A. Each
time you do this, your vehicle will go about 1 mph
(
1.6 km/h) faster.
Reducing Speed While Using Cruise Control
Press in the button at the end of the lever until you reach
the lower speed you want, then release it.
To slow down in very small amounts, press the button
for less than a 1/2 second. Each time you do this, you'll
go 1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using Cruise Contro
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.
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