GMC 2011 Savana - Manual (Page 173)

Black plate (3,1) GMC Savana Owner Manual - 2011
Infotainment System 7-3
Theft-Deterrent Feature
TheftLock ® is designed to
discourage theft of the radio. The
feature works automatically by
learning a portion of the Vehicle
Identification Number (VIN). If the
radio is moved to a different vehicle,
it does not operate and either LOC
or LOCKED displays.
When the radio and vehicle are
turned off, there may be a blinking
red light to indicate TheftLock is
armed.
With TheftLock activated, the radio
does not operate if stolen.
Operation
AM-FM Radio