Wiring Harness & Bypass

I have a 2002 BUICK LASABRE Custom non onstart and i believe its heated...im looking for a wiring harness with a bypass so i can bypass the factory alarm system that seems to be hooked up with the car audio system !? if u guys have an idea of wat i should look for please help !!!! i been trying to avoid buying it online but cant seem to know wat to look for i mean i have an idea but im not an expert wit cars

 
Metra GMOS-09 2002 - 2005 BUICK LESABRE CUSTOM Car Audio Radio Module Interface - GMOS-09_2524

the car has a Class II Data Bus which does not include an ignition wire. the factory radio includes a host of other electronic features and stores other information.

http://forum.sounddomain.com/ubbthreads.php/ubb/showflat/Number/311575/page/1#Post311575

Affects of removing Class 2 radio from your vehicle 

 

 

Vehicle Customization Menu Options:

( Most Cavaliers, Sunfires and other base models do not offer most, if any of these features.

Check the vehicle owner’s manual to see available features. )

Displays current settings

Oil life monitor reset

Tire inflation monitor reset

Delayed headlamp illumination

Automatic door lock and unlock

Remote visual/audible verification of remote lock/unlock

Enable/Disable content theft

Enable/Disable trunk lock shock sensor

Short or long horn with remote lock/unlock

Key fob transmitter programming

The radio is used as a control panel to communicate with the vehicles computer for the customization of certain “convenience features”. All features work and remain at current settings with the factory radio removed, but can only be customized and/or reset by an authorized service center. More important than the above features and chime, there is no switched 12vlt. power supplied in the radios plug, so it will need to be sourced somewhere else such as the factory fuse panel. A 10A to 30A fused accessory power source is recommended. Depending on the vehicle there are several choices in the factory fuse panel, such as the sunroof or windshield wipers.
 
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