Keyless entry won't work, only drivers side works electronically

There's a timer relay under the dash about inline with your left kneecap . It might be green in color, but that part has failed.

Get into it by breaking its wind glass.

TRY A NEW BATTERY IN UR KEYLESS REMOTE

this is usually caused by a break in power wire right at the door janb inside of rubber accordian boot

I would change both batteries not just the one, it's best to change them in pairs.

Instructions to program a keyless entry remote for a Chevy Silverado. They also work on 2003, 2004 and 2006 Suburbans.

1. Close all the vehicle doors.
2. Insert the ignition key into the ignition lock cylinder.
3. Press and hold the DOOR unlock switch.
4. While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
5. Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
6. Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
7. Repeat the previous step to program up to four transmitters.
8. Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter mode.
9. Operate the transmitter functions in order to verify correct system operation

Unfortunately, the keyless entry remotes and OE systems usually require a dealership to service them. Sounds to me like they need to re-set the alarm

You don't normally program a keyless entry, that's done for you by the technicians that install that. If the replaced battery doesn't solve the problem, take the battery and the remote to the techies that installed it.

does the key pad light when you press a button at night? If yes, the fuse is ok.
Do you have the plastic card with the permanent code in your owner manual packet? If yes, tryit.
report back.

Keyless Entry The keyless entry keypad is hardwired to the GEM. The GEM interprets the inputs from the keyless entry keypad and then controls the associated operation. The keyless entry keypad will be illuminated for five seconds when any button is pressed. Additionally, it will request the illuminated entry feature to turn the courtesy lamps on. If a lock all doors code is entered, the illumination will turn off, as well as request the illuminated entry feature to turn off the courtesy lamps. When pressed, the keyless entry keypad supplies the ground signal to the GEM or the GEM receives a signal from the keyless entry remote transmitter. Then the GEM outputs a ground signal to the appropriate lock or unlock relay which supplies the power to the actuator to lock or unlocks all doors, including the luggage compartment. The keyless entry remote transmitter also unlocks the liftgate or activates the panic alarm by sending a signal to the GEM.
--------------------------------------------------------------- Visual Inspection Chart Mechanical Electrical

• Keyless entry keypad
• Keyless entry remote transmitter

• Central junction box (CJB) Fuse F222 (20A)
• Circuitry
• Generic electronic module (GEM)

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• No communication with generic electronic module (GEM)

• Generic electronic module.
• Circuitry.

• REFER to Section 419-10 .

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Possible weak battery has got the security system where it want respond or in some models want let the vehicle start until a new battery is installed and you use the keyless remote to active the securtiy mode a time or two possilbe then the vehicle will operate properly ..no question it is something electronic and this might be a possilbe solution check the battery to see if is still good,