GMC 1994 Sonoma Owner's Manual page 90

To Get Out of Cruise Control
There are two ways to turn off the Cruise Control:
To Erase Speed Memory
Step lightly on
the brake pedal or
push the clutch
pedal, if you have
a manual
transmission
0
Move the Cruise
switch to
OFF.
When you turn off the Cruise Control or the ignition, your Cruise Control
set speed memory is erased.