Question about 1999 GMC Yukon

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Key fob works pwr door locks just fine, but all interior pwr dr lock buttons don't work.

Interior pwr dr lock buttons only pwr lock all doors, but will not pwr unlock any doors. What part is broken?

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 1056 Answers

SOURCE: right door pwr lock pwr

Check the cabling that goes from the firewall to the right door (open the door, and you will see it at the front of the door.)

Look for any damage to the cable its self, then check the connectors.

From tehre I would start checking power to the connectors.

Posted on Aug 05, 2008

  • 5763 Answers

SOURCE: how come on a 2002 GMC Denali if you lock your key inside

i would say the theft module saw the door trying to be open without the door lock or fob first, once the door lock button was pushed it shut down, it new doors were trying to be unlocked in a theft manner, once shut down it needs time to reset or needs to see ignition cycle with key and read chip in key, smart system isnt it, good luck.

Posted on Oct 21, 2009

Testimonial: "I thought it was something like that, so I guess using the car door wedge set this into motion and the guy with the keys inside the vehicle is screwed"

  • 8 Answers

SOURCE: 1995 GMC Suburban. The interior power door lock switches not work

Take The Driverside Control panel Off The Door,And Check Conection On The Main Switches,These Vehicles Have Locks On Them, And If They get loose The Stop Working,Also Check The Little Switch Towards The Front of Panel,It Also May Be Loose,Use Caution,The Clips Are Fragile..

Posted on Nov 06, 2009

  • 334 Answers

SOURCE: 1999 GMC Suburban -- Interior lights & door lock issue

this problem i have repaired many times.. it is normally a broken wire in the flexible rubber tube between the door and the doorjamb from years of flexing back and forth when you open and close the door.. i hope that helps

Posted on Dec 10, 2009

  • 1 Answer

SOURCE: Yukon xl rear door won't unlock and there is no manual lock.

I have the exact problem described. I can't find any brass contacts on the door frame of any door. What door are you referring to? The liftgate is closed and locked, so I can't get to that door frame.

Posted on Apr 25, 2010

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Normal key operation will not unlock drivers door or key fob

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Why does my 2001 f250 keep locking and unlocking while truck is off

1. Bad ground or connection at one of the door lock activators and/or switch. 2. Bad relay. 3.A loose or bad connecting door button (the plastic button in the door jamb that tells the car that your door is closed, it usually also activates the interior light. 4. Your key fob might have a problem. I had a Taurus where the key fob had a very small loose piece of wire in it and it caused the connection inside to conduct, thus activating the door lock when the key-fob moved in my pocket. Take the batteries out of the key fob. Does the door still lock and unlock?

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You possibly need to reprogram the lock system to match your fobs.
If it unlocks by the interior switches then its the fob programming. This site is one example you can look for. If this is not the issue the computer that does the door locks could have died or you can look for the door lock fuse or a cut or pinched wire (due to other damage in an accident or from prior mods you did). Other possibilities include intermittent door solenoids if you can use the interior switch you can click it open and closed until you find the one that does not work every time. Change it out as it can leave your vehicle unlocked or it might interrupt the system. worst case it could be the chassis computer this site sells some . If the shift lock system is screwed up it could be casing issues also but that's a long shot.

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1 Answer

2007 Marquis. No interior lighting. Power door and truck locks do not work. Keyless entry dark. Originally the truck release would work intermittently from the door button or the key fob. A day later...

You pobably have a problem with the lamp control module , or the SCP serial data network . Vehicles that have more then one control module , like your vehicle ! The modules share info an send control messages on the data network . The door lock's are controlled by driver door module an is also on SCP network .
Communications Network Information Module

The first step in diagnosing these type problems would be to hook up a professional type scan tool . Check codes an see if the module's are all talking .
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Rover 75 Connoisseur SE Sat/nav 2004 (53). The central locking button on top of the driver's passenger door doesn't pop down when the interior central locking switch is pressed,while the other 3 door...

It may be set in the main menu to lock only by the fob. I know on GMC's there are about 7 different locking options. I'm not a specialist in Land Rovers but the cheapest way out is to check all your options on the dash/steering wheel buttons.

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This is basically the steps in the owners manual, but the car must be started with the key first, and the key must be in the door lock before pressing the lock button.

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