How do you disable a factory installed car alarm on a 97 gmc cheyenne?

Answer 1

Hi, my name is Cris and I work as a tech on alarm systems. I may be able to help you disable your alarm. I, however, would need you to answer some questions.
First of all, would you be able to post some pictures of the actual alarm(I.E. - LED, remotes) on this forum? How long ago did you buy this truck? Was it from a used car lot or a certified dealership?
All of these questions can help me determine what manufacturer installed the alarm on your truck and therefore better explain how to disable it.
Either way, a very overgeneralized and crude way to disable/remove the alarm from your vehicle is fairly easy if you know where to look. A few places may consist of.... If you remove the driver side kick panel, it may reveal some wiring that is almost unmistakeable. All car manufacturers like clean wiring. Alarm companies 'tap' into these wires to integrate the Alarm. Most companies never cut and splice, instead they have a very noticeable 'tap' that looks like a very small plug that was crimped to a wire. Usually you will see five or more of these 'taps' behind the kick panel. Those you can just pull off because the plugs belong to the alarm's wiring harness, not the vehicle's.
Also, if you look under the driver side dash, you may be able to see the alarm's 'brain' or control unit. Usually, the 'brain' consists of one or two small plastic boxes with a few plugs attatched. The 'brain' is usually anchored with one or more zip ties. You may be able to disable the alarm by merely unplugging the 'brain'. I suggest trying this first and then attempt to start the vehicle. Most alarm companies have a starter diable therefore certain alarm companies have a tamper secured 'brain' that does not allow you to start the car if it is unplugged. So try unplugging one at a time and try to start the vehicle after each. If that works, your fine.
If it doesnt, the last thing would be detatching the panel under the steering column. there will be another set of 'taps' that you must unplug. Any wires that are cut at that point will usually be crimped together. Remove the crimps and crimp the vehicle's wire's back together.(those are color coded for your convinience. At that point, attemp to start the vehicle.
If that doesnt work, answer some of my questions and post some pictures of the areas ive explained to you. Good Luck