2004 GMC Sierra 1500 Pickup Owner's Manual - Page 99

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: Remote Keyless Entry System Operation If your vehicle has this feature, you can lock and unlock your doors from about 3 feet (1 m) up to 30 feet (9 m) away using the remote keyless entry transmitter supplied with your vehicle. UNLOCK: Pressing this button once will unlock the driver's door. The parking lamps will flash and the interior lights will come on. The ground illumination lamps will come on. Pressing UNLOCK again within three seconds will cause the remaining doors to unlock. The parking lamps will flash and the interior lights will come on. LOCK: Pressing this button once will lock all of the doors. Wait one second, then press LOCK again and the horn will chirp. Operating the keyless entry transmitter may interact with the theft-deterrent system. See Content Theft-Deterrent on page 2-19. • Check the distance. You may be too far from your vehicle. You may need to stand closer during rainy or snowy weather. • Check the location. Other vehicles or objects may be blocking the signal. Take a few steps to the left or right, hold the transmitter higher, and try again. • Check to determine if battery replacement or resynchronization is necessary. See "Battery Replacement" and "Resynchronization" under "Remote Keyless Entry System Operation" following this section. • If you are still having trouble, see your dealer or a qualified technician for service. 2-5