Hummer Forums - Enthusiast Forum for Hummer Owners

Make sure your horn is working (press on horn button). If it doesn't sound, check the horn fuse. If it is working, then make sure your RKE (Remote Keyless Entry) feeback is set right. The security system is ONLY armed when you use the remote to lock the vehicle, and has different types of feedback to let you know it has worked. Some honk the horn, some do not. Here are the instructions on how to set, and what the different modes are:
Remote Keyless Entry (RKE) Feedback

This feature allows you to program your Remote

Keyless Entry (RKE) feedback to a preferred

setting.

To set your choice for this feature, perform the

following steps:

1. With the engine off, turn the key to LOCK.

Do not remove the key from the ignition.

2. Press and hold the lock and unlock buttons

on the RKE transmitter at the same time.

Hold both buttons until the DIC display shows

the current RKE feedback mode.

3. To view the next available mode, press and

hold the reset stem for about two seconds.

Release the reset stem and press and

hold again to view each mode.

4. Once the desired mode is shown on the DIC

display, briefly press the reset stem to set

your choice. The DIC display will then clear.

The following are the available modes:

RFA 1 (default):

This mode flashes the parking

lamps when you press the lock or unlock

buttons on the RKE transmitter.

RFA 2:

This mode flashes the parking lamps and

sounds the horn when you press the lock button

on the RKE transmitter. This mode also flashes the

parking lamps when you press the unlock button

on the RKE transmitter.

RFA 3:

This mode flashes the parking lamps

and sounds the horn when you press the lock or

unlock buttons on the RKE transmitter.

RFA 4:

This mode disables RKE feedback. There

will be no feedback when you press the lock or

unlock buttons on the RKE transmitter.