1999 GMC Sonoma Owner's Manual - Page 64

yellowblue This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference received, including interference that may cause undesired operation of the device. Changes or modifications to this system by other than an authorized service facility could void authorization to use this equipment. This system has a range of about 3 feet (1 m) up to 30 feet (9 m). 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: 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. qualified technician for service. D Check the location. Other vehicles or objects may be D If you're still having trouble, see your dealer or a Operation UNLOCK: When you press UNLOCK, the driver's door will unlock automatically, the parking lamps will flash and the interior lights will go on. If you press UNLOCK again within three seconds, the remaining doors will unlock, the parking lamps will flash and the interior lights will go on. LOCK: Press LOCK to lock all the doors. Press LOCK again within three seconds and the horn will chirp. Remote Panic Alarm 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, waiting for 30 seconds, or starting the vehicle. D Check to determine if battery replacement or resynchronization is necessary. See the instructions that follow. 2-6