Testing the Alarm
To test the alarm:
1. From inside the vehicle, lower the driver side window, and open the driver door.
2. Press
.
3. Get out of the vehicle, close the door, and wait for the security light to go out.
4. Reach in through the window, unlock the door with the manual door lock, and open the door.
This should set off the alarm.
If the alarm does not sound when it should, but the headlamps flash, check to see if the horn works.
The horn fuse may be blown.
To replace the fuse, see Fuses and Circuit Breakers on page 10‑31.
If the alarm does not sound or the headlamps do not flash, see your dealer for service.
See also:
Online Owner Center
GMC Owner Center (U.S.) www.gmcownercenter.com
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General Information
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Infotainment
Determine which radio the vehicle has and read the following pages to become familiar with its features.
WARNING
Taking your eyes off the road for extended periods could cause a crash resulting in i ...





