factory arming and disarming

I have a 2001 chevy silverado 1500. I want to install an alarm soon, but i also want to use the factory alarm. is it difficult to do this or should I just ground the factory disarm wire to disable it all the time. any suggestions? do i need to use relays? anything that can help is appreciated. thanks!

whats the brand of the unit? your truck has an easy reach disarm wire, use might need to use a relay. some car's disarm wire is at the door and they ground it permanently cause theyre too lazy (like me) to run it through the door, it takes forever to get the wire through the door. |FCTRY ALRM DISARM|lt.green            |- |drivers kick *4             |Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

*4 Also found in the purple plug of the BCM.       

it is a crimeguard 533i3 dont know if that makes a difference

Just wanted to say thanks profuse for the help. I will let u all know how it goes. I'll be running back to this post if i have any more problems. Thanks again you are all great

i ask for the brand of the unit, cause some unit have the disarm wire built-in so you dont have to run a relay when its not necessary. have fun!!!Houston,TX

"The two most common elements in the universe are H+ and stupidity" (Ellison).

mine does not have a disarm wire . i will need a relay. any tips on hooking it up?