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Originally Posted by n2racingcars
I have replaced the battery and it still doesn't unlock the doors or the trunk. When it started going bad it would work sometimes if you did it several times
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Try Re-synchronizing the remote, does the alarm / open truck buttons work still? you can open the remote up and see if theres any water in there aswell. Might just be the remote is toast, happened to me.
In order to resynchronize the transmitter, press and hold the transmitter LOCK and UNLOCK buttons simultaneously for at least 7 seconds , or until the following condition is present, the horn sounds 3 times.
Perform the transmitter resynchronization procedure if the following conditions exist:
The batteries on the keyless entry transmitter have been replaced.
A keyless entry transmitter is malfunctioning.
Transmitter Programming
Perform the following procedure when replacing transmitter(s).
IMPORTANT:
Once entering this procedure, programming the first transmitter erases all previous transmitters. You must program all transmitters.
Program one vehicle at a time. One transmitter could be programmed into other vehicles that are also on program mode in close proximity.
1. Pull the MALL PGM Fuse.
2. Turn the ignition switch to the ACC position. The seat belt indicator flashes and the chime sounds 2, 3 or 4 time . This action identifies which type of BCM, is installed on the vehicle. Check that the BCM installed on the vehicle is compatible with all of the features on the vehicle. Keyless entry requires BCM type 3 or 4.
3. Turn the ignition switch from the ACC position to the OFF position, then back to the ACC position within 1 second. This action causes the BCM to enter the diagnostic/program mode. The BCM may flash and chime Diagnostic Trouble Codes (DTCs) . The number of flashes and chimes equals the DTC number. If there are DTCs in memory, record the DTCs and perform the appropriate repairs.
4. Open and close any vehicle door. You should hear a chime if you are in the diagnostic/program mode. If unable to enter diagnostics, there is a control module problem.
5. Press and hold the lock and unlock buttons at the same time on the keyless entry transmitter for 14 seconds.
At the 7-second mark, you may hear a chime. This chime feedback indicates that the transmitter has been resynchronized.
Continue holding the lock arid unlock buttons until hearing another chime ground the 14-second mark. This chime feedback indicates that the transmitter has been programmed successfully.
6. Repeat step 5 for the rest of the transmitters (for a total of 4 transmitter).
7. Exit the BCM diagnostics/programming mode:
Turning the ignition switch to the LOCK position.
Reinstall the MALL PGM Fuse.
