2002 GMC Envoy Owner's Manual - Page 80

Changes or modifications to this system by other than an authorized service facility could void authorization to use this equipment. At times you may notice a decrease in range. This is normal for any remote keyless entry system. If the transmitter does not work or if you have to stand closer to your vehicle for the transmitter to work, try this: Operation (Unlock): When you press unlock, the driver's door will unlock automatically, the parking lamps may flash and the interior lights will go on. D Check the distance. You may be too far from your vehicle. You may need to stand closer during rainy or snowy weather. blocking the signal. Take a few steps to the left or right, hold the transmitter higher, and try again. D Check the location. Other vehicles or objects may be D Check to determine if battery replacement or You can program different feedback settings through the Driver Information Center (DIC). For more information see "Driver Information Center (DIC)" in the Index. (Lock): Press lock to lock all the doors. Press lock again within three seconds and the horn will chirp. (Panic): When the button with the horn symbol on the key transmitter is pressed, the horn will sound and the headlamps and taillamps will flash for up to 30 seconds. This can be turned off by pressing the horn button again, or by waiting for 30 seconds, or by starting the vehicle. resynchronization is necessary. See the instructions that follow. qualified technician for service. D If you're still having trouble, see your dealer or a 2-11