2002 GMC Envoy Owner's Manual - Page 167

If you choose horn, the horn will chirp the second time you press the button with the lock symbol on the remote keyless entry transmitter. If you choose lamps, the parking lamps will flash each time you press the button with the lock symbol on the remote keyless entry transmitter. Choose one of the four options and press the personalization button while it is displayed on the DIC to select it and move on to the next feature. Remote Unlock Feedback Press the personalization button until REMOTE UNLOCK FEEDBACK appears in the display. To select your personalization for the feedback you will receive when unlocking the vehicle with the remote keyless entry transmitter, press the select button while REMOTE UNLOCK FEEDBACK is displayed on the DIC. Pressing the select button will scroll through the following choices: D UNLOCK FEEDBACK: OFF D UNLOCK FEEDBACK: HORN If you choose lamps, the parking lamps will flash each time you press the button with the unlock symbol on the remote keyless entry transmitter. If you choose both, the parking lamps will flash each time you press the button with the unlock symbol on the remote keyless entry transmitter and the horn will chirp the second time you press the unlock button. If you choose off, there will be no feedback when unlocking the vehicle. If you choose horn, the horn will chirp the second time you press the button with the unlock symbol on the remote keyless entry transmitter. Choose one of the four options and press the personalization button while it is displayed on the DIC to select it and move on to the next feature. D UNLOCK FEEDBACK: LAMPS (default) D UNLOCK FEEDBACK: BOTH 2-98