I have a gate house keyless (PL1)and have switched to a right handed door from a left handed door. How do we switch the locking system to work?

Cud b a module issue..them cars r complex..gitit scand atta partplace forfree. Dont go tua dealr

Lock an unlock by them selves ? Door locks are computer controlled ,by the BCM - body control module .
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Power Door Locks Circuit Description
The power door lock system includes the following components:
• The door lock actuators
• A door lock relay
• An door unlock relay
• A driver door unlock relay
• The door lock and side window switches
• The body control module (BCM)
• The endgate lock cylinder switch /liftgate lock cylinder switch (utility)
• The keyless entry, if equipped
The door lock and liftgate mechanisms may be controlled by the following switches:
• The door lock and side window switches
• The BCM
• The endgate lock cylinder switch / liftgate lock cylinder switch (utility)
• The keyless entry, if equipped
The following locking functions are included on the vehicle:
• All the doors unlock -- All the doors will unlock, including the endgate/liftgate, when any power door unlock switch is detected. The passenger doors lock directly by pressing the lock switches. The driver door unlocks by the BCM using a driver door unlock relay.
• All the doors lock -- All the doors will lock, including the endgate/liftgate, when any power door lock switch is activated. All the lock actuators will activate directly from the power door lock switch (external to the BCM).
• The end/lift gate lock switch -- All the doors will lock or unlock from the end/lift gate lock switch.
• The lockout prevention -- This function will prevent the doors from automatically locking if the keys have been left in the ignition and the power door lock switch is operated.
The motor is protected by a built-in electronic circuit breaker (ECB). If the motor is overloaded or voltage is applied for an excessive amount of time, the ECB internal resistance increases, essentially creating an open circuit. The resistance returns to normal only after voltage is removed from the circuit, thereby restoring circuit continuity.

You have a bad switch input to the BCM !
Door lock acting up 2005 Chevy Malibu fix it here
Door Locks Go Crazy 2

DR/LCK fuse 25 amp . located in the I/P block
Fuse Block - I/P
In the right front kick panel

Power Door Locks System Components
The power lock system consists of the following components:
• Body control module (BCM)
• Driver door lock cylinder switch
• Front passenger door lock cylinder switch
• Driver door lock switch
• Front passenger door lock switch
• Door lock actuators in each of the doors
• DR LK Fuse 20-amp
Door Lock System Controls
The Power Door Lock System is controlled by the body control module (BCM) and can be activated by any one of the following:
• A door lock switch lock or unlock actuation
• A door lock cylinder switch unlock actuation
• A keyless entry transmitter actuation
• An automatic door lock actuation (Personalization function)
• An automatic door unlock actuation (Personalization function)
Door Lock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the lock position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the lock position.
Driver Door Unlock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the left front (LF) door lock actuator motor transitions to the Unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function (if programmed).
Passenger Door Unlock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuator motors. This is done so that the driver door may be unlocked separate from the passenger doors using a keyless entry transmitter or an automatic door unlock function (if programmed).

Theft Deterrent Arm/Disarm Modes
Important: Although mode 2 provides increased security, the content theft deterrent system disarms only by pressing unlock on the keyless entry transmitter. This can pose a problem if the keyless entry transmitter is damaged, lost, or inoperative for any reason while you attempt to disarm the content theft deterrent system.
Mode 1: The system arms when you lock the doors with the keyless entry transmitter. The system disarms when you unlock the left front, right front, or liftgate door with the key or the keyless entry transmitter. The system does not arm when you lock the doors with a power door lock switch.

Mode 2: The system arms when you lock the doors with the keyless entry transmitter. The system disarms when you unlock the doors with the keyless entry transmitter. The system does not disarm when you unlock the doors with the key.

Mode 3: The system arms when you lock the doors using a power door lock switch or the keyless entry transmitter. The system disarms when you unlock the left front, right front, or liftgate door with the key or the keyless entry transmitter.
Changing the Feature Customization Modes

1. Turn off the IP dimmer switch.
2. Turn the ignition switch to the LOCK position.
3. Remove the BCM PRGRM fuse.
4. Turn the ignition switch to the ACC position. The BCM flashes the fasten belts indicator and sounds the chime 4 times, which indicates that BCM type 4 is installed on the vehicle. At this point, the BCM has entered the feature customization mode.
5. In order to change the theft deterrent/shock sensor mode, turn the headlamp switch from OFF to PARK and back to OFF.
The BCM flashes the fasten belts indicator and sounds the chime a number of times equivalent to the theft deterrent/shock sensor mode. A transition past mode 4 repeats the sequence starting with mode 1.

6. Complete the following steps in order to change the theft deterrent arm/disarm mode:

6.1.
Insert the key in the left front, right front, or liftgate door lock cylinder.

6.2.
Rotate the key from the center to the unlock position.

6.3.
Press the horn button on the remote keyless entry transmitter.

6.4.
Count the number of chimes that you hear. The number of chimes tells you which mode you have set.

6.5.
Press the horn button again in order to change the mode. Continue to press the button until you hear the number of chimes that indicates the mode that you want.

6.6.
Turn the key back to the center position and remove the key from the door key cylinder.

In order to exit and save the current feature customization modes use the following procedure:

1. Turn the ignition switch to the LOCK position.
2. Reinstall the BCM PRGRM fuse.

If you are unable to change locking modes Theft Deterrent System Feature Customization Inoperative

This is because your master switch on the drivers door may have corroded oxidation on the contacts inside the switch and that master switch is the feed for all inside door lock switches your remote and keypad work because those electrical signals go through the driver door module you must clean all contacts on the master switch get them shiny you can use 4/0 steel wool and alcohol and also take the lock switch apart and clean the button contacts inside the switch for this use alcohol and 1000 grit sandpaper glued to a pencil and lightly spin in your fingers to shine the contacts sometimes just an eraser works but it depends on the quality of it so go with the sandpaper glued to the pencil or any circular object that will fit inside after this blow out the switch and use the alcohol to clean out and let dry

Keyless Entry
The keyless entry system consists of the following:

• smart entry control(SEC)/timer module
• keyless entry remote transmitters
• power door lock actuators
• body side door power door lock actuator
• liftgate actuator
• power door lock switches
• door ajar switches
• Principles of Operation
  All doors can be locked at once by turning the door key lock switch to the locked position. An individual door can be unlocked by moving the door key lock switch to the unlocked position and turning it again within five seconds; all the doors (including the liftgate) will unlock.
  The smart lock system is designed to keep the driver from locking his keys in the car. It will lock and then unlock all the doors if the smart entry control(SEC)/timer module detects the following conditions:
  
  • The ignition key still in the ignition.
  • A front door is open.
  • A door lock switch has been pushed to the lock position.
  The panic feature has a duration of 30 seconds from the last time the PANIC button is pressed. When locking the doors from the remote transmitter, the horn chirp/lamp flash feature can be disabled or enabled by holding the LOCK and UNLOCK buttons for two seconds. The hazards will flash three times to confirm that the feature has be enabled or disabled.

The control module probably see's an input that shouldn't be there . lock Switch , door ajar etc... Don't think it has anything to do with the remote . Some part stores have a tester to see if signal from the remote is working . Or the dealer ! Take it an see if your remote is sending a signal without you pressing any buttons .
If it is you need a new one .

Note:
Entering the programming mode cancels all learned keyless remotes, so none of the
previously programmed remotes will work. You must reprogram all of the keyless
remotes once you are in the programming mode. You must complete each step within 5 seconds of the previous step to keep the
system from exiting the programming mode.
1. Turn ignition switch to ON (II)
2. Press the LOCK or UNOCK button on one of the remotes. (An unprogrammed
remote can be used for this step.)
3. Turn ignition switch to LOCK (0)
4. Repeat steps 1, 2 and 3 two more times using the same keyless remote used
in step 2
5. Turn the ignition switch to ON (II)
6. Press the LOCK or UNLOCK button the same remote. Make sure the power door
locks cycle to confirm you are in programming mode.
7. Press the LOCK or UNLOCK button on each remote you want to program. Make
sure door locks cycle after you push each remote button to confirm system has
accepted the remote.
8. Turn the igniton switch to LOCK (0) to exit programming mode.
9. Test remote(s)

Keyless Entry System Circuit Description
The Power Door Locks/Remote Keyless Entry control system provides several functions. The driver operates the vehicle door locks and rear window release from outside the vehicle using a hand-held radio transmitter. The transmitter sends coded signals to the remote control door lock receiver. The remote control door lock receiver detects and decodes the signal from the transmitter. The remote control door lock receiver issues signals to the body control module (BCM) through a serial data link. The BCM actuates relays to lock and unlock the doors and liftgate. The BCM can also release the liftglass. The power door lock switches provide manual control of the door locks.


Transmitter Programming
Important: Different keyless entry systems are used on General Motors vehicles. The parts are not interchangeable even though the parts may appear to be similar. Observe the back of the transmitter in order to properly identify the system. On 1998 S/T pickups and utilities, use a transmitter identified with GM/UTA preceding the part number.
With the driver door closed, hold down the power unlock button on the door panel.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Turn the ignition switch to the ON position.
Turn the ignition switch to the OFF position.
Release the power unlock button on the door panel.
The remote control door lock receiver will respond in the following manner in order to indicate that the receiver is in the programming mode:
6.1. Locking the doors
6.2. Unlocking the doors
Important: All extra transmitters must be programmed at this time. When a new transmitter is programmed, it will deactivate the old transmitters.
Hold down the lock and unlock buttons on the transmitter until the remote control door lock receiver will respond in the following manner:
7.1. Locking the doors.
7.2. Unlocking the doors.
Repeat step 7 for each additional transmitter.
Turn the ignition switch to the ON position in order to exit the transmitter programming mode.

IF DOOR LOCKS LOCK AND UNLOCK.WHILE HAND OPERATING DOOR LOCK SWITCH.YOUR REMOTE KEYLESS BATTERY WEAK.IF DOOR LOCKS DONT WORK BY USING YOUR HANDS TO WORK THE SWITCH.LOOK FOR A BLOWN FUSE OR CIRCUIT BREAKER.

The driver door module (DDM) is connected on the standard corporate protocol (SCP) communication network. The DDM controls many functions including power windows, power door locks and remote keyless entry. The DDM also communicates with the driver seat module (DSM) to control the power mirror and seat memory functions.
Do you know anything about automotive electronic control modules ?
The driver door module (DDM) receives inputs from the digital transmission range (DTR) sensor, ignition switch, seat switch, window/door lock switches, lighting control module (LCM), keyless entry keypad switch and remote transmitter. The DDM outputs consists of keyless entry keypad switch illumination, power door lock actuators, luggage compartment release solenoid, horn relay, and lighting control module (LCM).
Best thing to do would be to have a factory scan tool hooked up to check for DTC'S diagnostic trouble codes . That should be the first step if it's not programming the code.

• The doors do not lock/unlock using the keyless entry keypad

• Keypad.
• Circuitry.
• Driver door module (DDM).

• GO to Pinpoint Test L .

PINPOINT TEST L: THE DOORS DO NOT LOCK/UNLOCK USING THE KEYLESS ENTRY KEYPAD CONDITIONS DETAILS/RESULTS/ACTIONS L1 RETRIEVE THE RECORDED RESULTS FROM BOTH CONTINUOUS AND ON DEMAND SELF TESTS Use the recorded DDM DTCs from the Continuous and On Demand self tests.

• Are any DTCs recorded?

Yes For DTC B1525, GO to L3 .

For all other DDM DTCs, REFER to the DDM Diagnostic Trouble Code (DTC) Index.

No If the door locks are inoperative, GO to L2 .

If the keypad illumination does not operate, GO to L10 .

If the keypad illumination is on continuously, GO to L14 .
L2 CHECK THE DOOR LOCK OPERATION Check the door lock operation by depressing a door lock switch.

• Do the door locks operate?

Yes GO to L3 .

No GO to Pinpoint Test E . L3 MONITOR THE DDM PID KEY_PAD
Scan tool
Monitor the DDM PID KEY_PAD.

• Are any of the keyless entry keypad switch numbers present?

Yes GO to L4 .

No GO to L5 . L4 CHECK THE KEYLESS ENTRY KEYPAD SWITCH
Keyless Entry Keypad Switch C525
Monitor the DDM PID KEY_PAD.

• Are any of the keyless entry keypad switch numbers present?

Yes If 1/2, REPAIR Circuit 78 (LB/YE). TEST the system for normal operation.
If 3/4, REPAIR Circuit 79 (LG/RD). TEST the system for normal operation.
If 5/6, REPAIR Circuit 121 (YE/BK). TEST the system for normal operation.
If 7/8, REPAIR Circuit 122 (YE). TEST the system for normal operation.
If 9/0, REPAIR Circuit 123 (RD). TEST the system for normal operation.

No INSTALL a new keyless entry keypad switch; for additional information, REFER to Keypad-Keyless Entry . L5 CHECK THE KEYLESS ENTRY KEYPAD INPUT WITH THE KEYLESS ENTRY KEYPAD SWITCH Monitor the DDM PID KEY_PAD, while depressing all the keyless entry keypad switches one at a time.

• Are all the keyless entry keypad switches operating correctly?

Yes GO to L9 .

No GO to L6 . L6 CHECK CIRCUIT 797 (LG/VT) FOR VOLTAGE
Keyless Entry Keypad C525
Measure the voltage between keyless entry keypad C525-7, Circuit 797 (LG/VT), and ground; and between keyless entry keypad C525-8, Circuit 797 (LG/VT), and ground.

• Are the voltages greater than 10 volts?

Yes GO to L7 .

No REPAIR Circuit 797 (LG/VT). TEST the system for normal operation. L7 CHECK THE KEYLESS ENTRY KEYPAD SWITCH INPUT While monitoring the DDM PID KEY_PAD, momentarily connect a fused (7.5A) jumper wire between positive battery post and keyless entry keypad switch C525 as follows:

Keypad Button Keyless Keypad Switch C525 Circuit 1/2 Pin 3 78 (LB/YE) 3/4 Pin 4 79 (LG/RD) 5/6 Pin 5 121 (YE/BK) 7/8 Pin 6 122 (YE) 9/0 Pin 1 123 (RD)

• Are all the keyless entry keypad switch inputs operating correctly?

Yes INSTALL a new keyless entry keypad switch; for additional information, REFER to Keypad-Keyless Entry .

No GO to L8 . L8 CHECK THE KEYLESS ENTRY KEYPAD SWITCH CIRCUITRY FOR AN OPEN
DDM
Measure the resistance between keyless entry keypad switch C525 and DDM as follows:

Keyless Keypad Switch C525 DDM Circuit Pin 3 C521 Pin 8 78 (LB/YE) Pin 4 C521 Pin 13 79 (LG/RD) Pin 5 C521 Pin 16 121 (YE/BK) Pin 6 C520 Pin 24 122 (YE) Pin 1 C520 Pin 25 123 (RD)

• Is the resistance less than 5 ohms?

Yes INSTALL a new DDM; for additional information, REFER to Section 419-10 . TEST the system for normal operation.

No REPAIR the circuit in question. TEST the system for normal operation. L9 CHECK THE KEYLESS ENTRY KEYPAD BACKLIGHT Depress a key on the keyless entry keypad.

• Does the keypad illumination operate correctly?

Yes INSTALL a new DDM. For additional information, REFER to Section 419-10 . TEST the system for normal operation.

No If the keypad illumination does not operate, GO to L10 .

If the keypad illumination is on continuously, GO to L14 . L10 CHECK THE KEYPAD - DDM ACTIVE COMMAND KEYPAD BACKLIGHTING LIGHT ON AND OFF Trigger the DDM active command KEYPAD BACKLIGHTING LIGHT ON and OFF.

• Does the keypad illumination turn off and on?

Yes INSTALL a new DDM. For additional information, REFER to Section 419-10 . TEST the system for normal operation.

No GO to L11 . L11 CHECK DDM GROUND - JUMPER CIRCUIT 66 (LB) TO GROUND
DDM 522
Connect a fused (7.5A) jumper wire between DDM C522-4, circuit 66 (LB), and ground.

• Does the keypad illuminate?

Yes INSTALL a new DDM; for additional information, REFER to Section 419-10 . TEST the system for normal operation.

No GO to L12 . L12 CHECK CIRCUIT 51 (BK/W) FOR OPEN
Keyless Entry Keypad C525
Measure the voltage between keyless entry keypad C525-7, circuit 797 (LG/VT), and ground; and between keyless entry keypad C525-8, circuit 797 (LG/VT), and ground.

• Are the voltages greater than 10 volts?

Yes GO to L13 .

No REPAIR circuit 797 (LG/VT). TEST the system for normal operation. L13 CHECK CIRCUIT 66 (LB) FOR OPEN Measure the resistance between keyless entry keypad C525-2, Circuit 66 (LB), and DDM C522-4, Circuit 66, (LB).

• Is the resistance less than 5 ohms?

Yes INSTALL a new keyless entry keypad switch; for additional information, REFER to Keypad-Keyless Entry .

No REPAIR Circuit 66 (LB). TEST the system for normal operation. L14 CHECK THE KEYPAD ILLUMINATION - DDM DISCONNECTED
DDM C522

• Does the keypad illumination turn off?

Yes INSTALL a new DDM; for additional information, REFER to Section 419-10 . TEST the system for normal operation.

No GO to L15 . L15 CHECK KEYLESS ENTRY KEYPAD FOR SHORT TO GROUND
Keyless Entry Keypad C525

• Does the keypad illumination turn off?

Yes GO to L16 .

No INSTALL a new keyless entry keypad switch. For additional information, REFER to Keypad-Keyless Entry . TEST the system for normal operation. L16 CHECK CIRCUIT 66 (LB) FOR SHORT TO GROUND Measure resistance between DDM C522-4, circuit 66 (LB), and ground.

• Is resistance greater than 10,000 ohms?

Yes System OK. CLARIFY the concern with the customer.

No REPAIR circuit 66 (LB). TEST the system for normal operation.