Question about 1999 GMC Yukon

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1999 gmc yukon, power door locks, will power lock but not power unlock

All the pwr-dr-lock buttons, when pushed will power lock all doors. But, push any of those buttons to unlock...will not power unlock any doors. The key fob will pwr lock & pwr unlock all doors. So, it seems the system works at each door(remote) but not any interior button as far as pwr unlocking goes. Is this a tough fix?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 625 Answers

SOURCE: 2004 tahoe

make sure than you have not split any fluids on the passenger front door most of the times is where the module to control the windows and doors is located, try by unpluging the batterie and the after a minute plug it back and see what happend but if any of your ft doors have been split with liquid or rain has gone inside then most likelly the module got moisture and not working

Posted on May 31, 2008

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  • 12 Answers

SOURCE: 2006 gmc yukon back door/hatch won't unlock

Check battery voltage. if above 13.7 volts move to rear lock actuator and measure battery voltage at actuator if above 13.6
replace actuator if below specs. check grounds and alternator out put as follows, alternator output 13.7 to 14.25 volts. key off battery volts should be 12.90 + - 3/10 of a volt and about the same voltage at the actuator. let me know. kindest regards Bill

Posted on Jan 30, 2009

johnjohn2
  • 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

  • 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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How come on a 2002 GMC Denali if you lock your key inside


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Sounds electrical/relay to me if you cannot lock by pressing the lock button on the door itself. Driver and passenger acting the same AND the remote all the same result point to only one culprit.
Let me know how it goes and best of luck!

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