My alarm is going off and i cant shut it off cause i dont have the keyless keypad how do i shut it off or bypass the alarm

more then likely it's a door ajar switch - not a sensor .
Anti-Theft- Perimeter Alarm System
The perimeter anti-theft system provides for vehicle security through an audible and visual notification if the vehicle's exterior is invaded without the system being shut off. The system self-arms when the doors, liftgate and hood are closed and the key is OFF. Any open door, hood or liftgate will prevent the system from arming. The hood ajar switch, door ajar switches and liftgate ajar switch cause these circuits to register as normally closed circuits. The vehicle security module monitors the status of the hood ajar, door ajar and liftgate ajar switches. If these circuits indicate an open entry point, the switch opens the circuit to the vehicle security module, which energizes the horn and autolamp relays (causing the horn to sound and the lights to flash). The vehicle security module turns off the anti-theft system when it receives a command through the keyless entry keypad, remote keyless entry (RKE) transmitter, or anti-theft alarm inhibit switch.
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depends on design on unit, on most you can simply disconnect system power and youre good to go. other in line systems require un installing the unit. either way sounds like the system is causing more problems than its solving. i would suggest removing it entirely

if you dont have the keypad to shut the alarm off, or put the key in the door first and unlock the car, then you are going to have to get the alarm disconnected

you should have a purple wire on the anitheft moduel ground it and it should disarm the alarm

There should be an alarm fuse, you can pull that to shut it off. A GM dealer should be able to set you up with a new keyless entry remote. I'm not sure which fuse it is, but the service manual should tell you. If not, the fuse block cover may tell you as well. Good luck

u can't turn it off you must bypass it, read the instructions, all that is required is the installation of a resistor. go to the link
http://vats.likeabigdog.com/

locate under dash fuse box. possibly on side of dash or in the glovebox. youll find an after market button. posh it.

there will be a button under or on the drivers side kick panel or under the dash ( could be as far up as the steering colom)

just hold it while the alarm is going off and it should set itself into valet mode...

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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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