1997 GMC Sonoma Owner's Manual - Page 54

Remote Keyless Entry System (If Equipped) If your vehicle has this option, you can lock and unlock your doors from up to 30 feet (9 m) away using the remote keyless entry transmitter supplied with your vehicle. Your Keyless Entry System operates on a radio frequency subject to Federal Communications Commission (FCC) Rules and with Industry and Science Canada. This device complies withP r 15 of the FCC Rules. at 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 devicecomplies with RSS-210 of Industry and Science Canada. Operation issubject 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: Check to determine if battery replacement or resynchronization is necessary. See the instructions that follow. Check the distance. You may be too far from your vehicle. You may need to stand closer during rainy or snowy weather. 0 Check the location. Other vehicles or objects may be blocking the signal. Take a few steps to the left or righ, hold the transmitter higher, and try again. If you're still having trouble, see your GM dealer or a qualified technician for service. 0 Changes or modifications to this system by other than an authorized service facility could void authorization to use this equipment. 2-6