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Gmc security system

The alarm system goes off randomly on its own on my 2013 GMC 2500 HD. I will be away from the car & key fob not in hand. Happening daily.

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  • GMC Master
  • 260 Answers

I think i might know how to solve the issue... Check out this site he sells a module to bypass the security and that should help with it going off randomly. I know i used it in mine and i haven't had any issues since

Posted on Sep 04, 2015

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 231 Answers

SOURCE: The security alarm on my 1996 BMW 750iL goes on

2 most likely causes are: 1: a faulty hood switch.Check for the switch around the microfilter housings near the strut towers. 2: a faulty interior sensor. If you are sitting in the driver's seat. Look directly above your head in the center of the car. Pull the cover at the edges. You should see a sensor inside the cover. Unplug the sensor and retest your system.

Posted on Mar 10, 2009

  • 50 Answers

SOURCE: How do I program my remote control Fob for my 1997 Key Fob

1. Locate the Data Link Port. It is located under dash drivers side. Be sure you know which pins are 8 and 4.

(Notice port is wider on top row)
obd-1.jpg








2. Make sure there are metal contact pins in terminals 8 and 4. Connect 8 to 4 with a suitable
jumper wire (leave the jumper wire connected throughout the programming procedure). Make
sure you know which terminals are 8 and 4. The vehicle will respond by locking and unlocking the
doors to signify entering of programming mode.
3. Press and hold both the LOCK and UNLOCK buttons together on the first transmitter to be
programmed. After about 15 seconds, the vehicle will respond by locking and unlocking the doors.
Release the buttons on the transmitter.

4. Within one minute, repeat the previous step on the remaining transmitters to be programmed.
5. Remove jumper wire applied to the OBDII Port.

Posted on Mar 16, 2009

jyackle5
  • 8197 Answers

SOURCE: pairing new alarm fob to cobra 777

Turn ignition key on and off around 5 times or till you here the alarm then hit the left and right button on fob till you here the alarm again then it is set. if you have 2 remotes you need to do them both at the same time.

Posted on Apr 07, 2009

dancandoit
  • 436 Answers

SOURCE: I have a Mitsubishi FTO with a cobra car alarm

hold down both buttons on the remote till they stop flashing, then press left then press right, this will recode the remote to the alarm. if this dont work try new batteries, if not then find an engineer.

Posted on Jan 03, 2010

hfmiles
  • 1165 Answers

SOURCE: toyota camry 3000 1996 est. alarm set on car. fob

There should be a reset button or toggle switch under the dash on the driver side. If you don't find it, remove the driver side kick panel and see if it us under there. Once you find the button, or toggle switch, turn the ignition key to the on position, then push and hold the button for a few seconds, or flip the toggle switch, then try to start the car. If there is a blinking red light on the dash, this light should go from blinking to solid when the alarm has been reset. If this works, you can continue to use this method to start your car, but I would advise that you have the alarm replaced with an aftermarket unit, or removed completely.

Posted on Feb 07, 2011

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1 Answer

My youkon alarm goes off every time i unlock the door with the autopage key fob.


Aftermarket alarms have to be configured to bypass the factory alarm system when using it.
I don't mean you have to permanently delete your factory alarm. What I am saying is, when you use your autopage key fob to unlock your doors, it must also send a signal to the disarm wire of your factory system simultaneously. If not, your alarm will go off just like you are experiencing.

May 16, 2017 | GMC Yukon Cars & Trucks

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How to i disconnect my alarm on my ivico daily as i lost my keys with a separate fob with the buttons on it and as i don't have the fob can't get the van to start


Mostly it can't be done. These days most keys contain a coded transponder but they used to be fitted in the fob.

The immobiliser/alarm will not disarm unless the transponder is physically close to the ignition switch. Mostly there is no way to bypass the system as the codes are embedded into the engine management system. The engine management ecu can be decoded and that might work or a new fob can be obtained and the system re-coded.

Those are really the only options available.

Jul 05, 2016 | Cars & Trucks

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How do I get my alarm system to chirp instead of beep when it goes off or when I lock my doors with the remote entry key fob?


Check to see if your vehicle honks when you press the "lock" button on your key fob. Press the "lock" button multiple times in a row. Many devices won't beep unless you double-tap the button after locking. If the horn doesn't honk, but the lights flash, your chirp feature is probably disabled.

Use your keyless fob and ignition key to enable the audible chirp. The process varies considerably on different makes and models. You must usually consult your owner's manual, a dealership or the alarm manufacturer for the correct process.

Jan 29, 2015 | 2006 Hyundai Tiburon

1 Answer

My 2002 GMC Yukon XL has never done this before and all of a sudden when I unlock the car with a key and open the door the burglar alarms goes off. When I use the key FOB no alarms go off. How do I


It's kind of mix problems , there is two kind of alarms
1...one for burglars alarms if someone try to break window and unlock from Inside lock
2....alarms for car finder on key fob

Oct 07, 2014 | 2002 GMC Yukon XL

1 Answer

Car alarm goes off when unlocking door


You will needs to think of it this way. Once you set your alarm it is looking for the corresponding signal to disable itself. That comes from the fob. If you don't use the fob and just use the key, the alarm system is doing its job and alerting you since it has not received the disable command from the fob. Either lock the door with the button when you exit the car if you want to use the key or use the alarm fob. This will also happen if you use the car manufacturers fob to unlock the car if you have locked it with the alarm manufacturers fob.

Hope that helps - I have hidden all of my original car fobs to help alleviate this problem!

Dec 29, 2013 | Cars & Trucks

1 Answer

2001 GMC SIERRA 2500 HD alarm horn stopped working, reg horn dose'nt work either. Alarm lights still go off when activated through key fob. Checked all fuses and wiring, driving lights not working...


You need an ohm meter and check to see if ther is power at the horns and lights. There is no programming that turns off the horn on the steering column. But I have one of these trucks and had the same problem with the lights and horns but it didn't happen at the same time. My lightbulbs burnt out and the actual horns under the bumper did to. Hope this helps.

Jun 29, 2011 | GMC Sierra 2500HD Cars & Trucks

1 Answer

I have 2002 2500 HD the battery died ,put new one in the security light goes on truck will start but not run


when you changed the battery you made the alarm trigger and more than likely it defalted back to the way it was when it was new! is it an after market system or factory? if it is an after market system their should be a button under the dash that will disable it, if it is a factory system try putting the key in an turning it all the way left then all the way right to disarm it! Is their a key pad where you enter a code?

Jan 10, 2011 | GMC Sierra 2500HD Cars & Trucks

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I ran my key fob thru the washing machine and my wife threw it away. I found one in the junk yard which looks the same but I've been unable to program it. I also disabled the factory alarm system to stop...


Let your other half know that if it happens again, cracking the case, removing the battery and placing it open in a warm place should restore it. If not, buy a jug of distilled water (zero minerals), bathe the fob in it and repeat the drying process.

Jan 03, 2010 | 1996 GMC Jimmy

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