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I have a 2003 Chevy Avalanche and it recently sat for a couple months and now my doors wont unlock with the keyless entry or the keys. what may have caused this and what can i do to fix it.

Its equipped with a factory security system

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  • chads4
    chads4 Dec 04, 2012

    It only has key entry on the drivers side door. It wont turn for some reason.

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  • Cars & Trucks Master
  • 5,546 Answers

I would think that the key is mechanical and when you insert it into the lock that nothing can stop the tumblers from working. The Electronics are another issue. Have the battery tested, many systems compare voltage strengths in setting engine operating parameters.

The are also testing devices on the counter of many autoparts stores which allow you to test your remote.

Your security system should have a read/write memory which may need to be reprogrammed for everything to work. This is a job for a Dealer.

So take your battery in, check the remote, and then see if the Menu in the car dash has a setting for turning on the Remote function. Often when vehicles are Serviced in Quick Change Oil facilities, for instance, the options are erased. If the battery died the same thing can happen. This Menu has things like allowing for the Horn to honk when setting the Alarm, and whether some optional features will work.

I hope my solution is helpful. Please rate my info and I would like to know how you made out on this problem.

Posted on Dec 04, 2012

  • fordexpert Dec 04, 2012

    It is the right key?. Some GM use separate key for the door. Glovebox or tailgate matches each other but not Ignition. Any chance Door was changed while you did not use the truck and lock was not rekeyed?

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SOURCE: 2001 Dodge Ram 1500 Keyless Entry/Security System

Your keyless/security system may have been damaged by the spikes. But, assuming you've already checked all the fuses, I would start by having the alternator tested. I would also check the alternator wire connection to the power distribution center (pdc). It can loosen and cause different problems.

Good Luck!

Posted on Jul 28, 2008

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SOURCE: keyless entry on honda civic 2006 not working

The keyless entry is designed to work with the doors closed (closed - not locked). If the door ajar sensor thinks the door is open the keyless entry is disabled. When you manually lock the door it might tighten the door just enough to activate the keyless entry. I would try slamming all the doors closed and then see if the keyless entry works. If it still wont work have the wiring checked on the front door lock.

Posted on May 12, 2009

usmc69
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SOURCE: Pontiac G6 unlock button on

I don't remember the right way to do it but the remote can be reset by clicking 1 , 2 or 3 times and holding in for 10 or more seconds. Call a GM service at your local GM dealer and they should be able to walk you through it.

Posted on Jun 14, 2009

messstat
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SOURCE: Keyless Entry won't Lock/Unlock back door

Factory keyless?

Posted on Jun 14, 2009

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SOURCE: 2003 Chevy Avalanche rear doors won't lock automatically

The rear doors will not lock with the keyless remote, the drivers master switch

Posted on Jul 30, 2009

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04 chevy avalanche starts and dies also poer windows and door locks and keyless entry dont work all happened overnight


sounds like a security issue, disconnect the neg terminal of the battery for 5 minutes, after you reconnect the battery use the door key to lock and unlock the drivers door. try to restart

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2005 Nissan Sentra, the keyless entry locks the doors but does not unlock them.


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Good afternoon....what would cause my 2008 Chevy


It could be the power lock motor. You could have a short or bad wiring harness. Might just be a fuse that connects to both. But since you said it's only the driver side. When the power lock motor is bad it can trigger your alarm because they're wired together.

Hope that helps. Good luck.

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try this procedure to reporgram:

1. Close all vehicle doors.

2. Insert the key into the ignition.

3. Hold down the power UNLOCK button on the driver's continue to hold down until instructed
to release in step 9.

4. Perform steps 5 through 8 in fairly rapid succession.

5. Turn the key to the ON position (as far as you can go without starting the engine).

6. Turn the ignition switch to the OFF position.

7. Turn the ignition switch to the ON position.

8. Turn the ignition switch to the OFF position.

9. Release the power unlock button on the door panel. The vehicle will lock and unlock the doors automatically.

10. Hold down the LOCK and UNLOCK buttons on the transmitter simultaneously until the vehicle locks and unlocks.
This step may take up to 30 seconds.

11. Repeat step 10 NOW for each additional transmitter (including any existing transmitters).

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The rear doors will not lock with the keyless remote, the drivers master switch

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Program fob


Instructions to program a keyless entry remote for a Chevy Silverado. They also work on 2003, 2004 and 2006 Suburbans.
  1. Close all the vehicle doors.
  2. Insert the ignition key into the ignition lock cylinder.
  3. Press and hold the DOOR unlock switch.
  4. While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
  5. Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
  6. Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
  7. Repeat the previous step to program up to four transmitters.
  8. Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter 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)
------------------------------------------------------------------------
  • No communication with generic electronic module (GEM)
  • Generic electronic module.
  • Circuitry.
  • REFER to Section 419-10 .
------------------------------------------------------------------------------------

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