GMC 2003 Sierra - Manual (Page 93)

Matching Tran$mitter(s) to Your
Vehicle
Each remote ksyless entry Irartsmitler cotJed to
prevent another Eransmitler Iram unlocking your vehicle,
ir a (ransmitler is lost or stolen^ a rEplacoment can
be purchased through your dealer. Remember \o bring
any remaining Irarrsrrtitrers with you when you go to
your dealer. When Itie dealer matches the replacement
transinilter to your vehicle, any remaining transmitters
must also be matched. Once your deafer has coded the
new transmitter, the Josi iransmittet will not unlock
your vehicle. Each vehicle cen have a maximum of four
transmitters matched to it.
Under nonmal use, the battery in your remote keyless
entry transmitter should last about two years.
You can tell the battery la weak rf the transmitter won't
work at The normal range in any location, If you have
to get close to your vehicle before the transmitter works,
it's probably time to change the battery.
^cifrce: When replacing the battery, use care not to
touch any of the circuitryu Static from your body
transferred to these surfaces may damage the
transmute r.
Battery Repiacement
2^6