Question about 1997 Chevrolet Tahoe

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How to replace auto lock/unlock actuator on 5th door of 99 Chevy Tahoe. panels are off, looks riveted on.

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  • Anonymous Mar 31, 2014

    disable auto door locks

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Some are bolted, but most are riveted,you need to drill them out and replace them with special rivets,5/16x7/16 all gm bodyshops have them 75cents to $1 each, but you need specail heavy duty rivet gun ,you will pay between $65-$100 for the rivet gun, if you have a friend at a local bodyshop i would borrow it with a deposit ,they get there gun back you get you cash back,hope this was helpfull

Posted on Jul 13, 2009

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My driver side door wont lock


The actuator that locks the door is probably worn out. I would simply lock it manually .
If you desire to , you can replace the actuator by removing the interior trim panel and drilling the rivets holding the actuator in the door. Replace the rivets with small screw/bolt combos .

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Two of my door locks will not unlock w/ remote or inside button.


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Here's a great video that will show you how to replace your door lock actuator.">

Jul 18, 2009 | 1999 Chevrolet Venture

1 Answer

Actuator removal


please rate as solved if this is what you need. You will need to borrow a heavy duty riveter from autozone or wherever you buy the lock cylinder from.


Removal
  1. NOTE: The rear door window glass must be completely raised.
    Disconnect the battery ground cable. For additional information, refer to Section 414-01 .
  1. Remove the rear door trim panel. For additional information, refer to Section 501-05 .
Trim Panel —Rear Door, Expedition Removal
  1. Remove the power window switchplate (14524).
  1. Disconnect the electrical connector.
  1. Remove the rear door handle trim cover.
  1. Remove the rear inside door handle.
    • Remove the door handle bolt.
  1. Remove the rear door trim panel screws at bottom of panel.
  1. s2j~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: To avoid damage to the rear door trim panel, do not pull directly outward.
    Lift upward and then outward to remove the rear door trim panel (27406).
  1. Remove the rear door watershield.
  1. Disconnect the power door lock actuator electrical connector.
  1. Drill out the power door lock actuator rivet.
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  1. Remove and discard the screws.
  1. Remove the power door lock actuator.
    • Disconnect the power door lock actuator rod.
Installation
  1. NOTE: Use new screws when installing the rear door latch.
    To install, reverse the removal procedure.
    • Use Heavy Duty Riveter to install the new rivet.

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1 Answer

2006 Tahoe Z71 Lift Gate Will Not Unlock With Remote


Take the liftgate inside panel off an check the wiring , connections etc....
rear door hatch lock repair GMC Chevrolet
chevy tahoe lift gate not opening
The liftgate will lock any time the vehicle is shifted out of park on vehicles equipped with an automatic transmission and at vehicle speeds exceeding 5 kph with manual transmission. This happens in conjunction with auto door locks if enabled or independently of auto door locks if the feature is disabled. This ensures that the liftgate is locked anytime the vehicle is shifted out of park or when the vehicle is in motion.
The liftgate lock relay supply and coil sides receive a constant voltage through the battery voltage supply circuit and the ECC fuse. The normally closed contact is connected to ground and the control side is connected to the body control module (BCM). A lock function will occur when a door lock switch activation, keyless entry lock transmission, auto door lock function or a liftgate lock function has been received by the BCM. The BCM will then ground the control side of the liftgate lock relay. This energizes the relay and allows voltage to be applied to the liftgate lock actuator lock control circuit. Since the other side of the liftgate lock actuator is connected to the normally closed contacts of the door unlock relay to ground, the liftgate will lock. When an unlock function occurs the BCM will ground the control side of the unlock relay and the rear doors and liftgate will unlock.
The BCM also runs diagnostics on the liftgate lock relay control circuit and will set DTC B3825 as current and also send a Class 2 message to the DIC. The DIC will display REPLACE LIFTGATE FUSE to inform the driver that a fault has been detected in the liftgate lock circuit and that the liftgate is not locked. Faults that will set the DTC and cause the DIC to display the message could be any of the following

Power Door Locks Inoperative - Endgate/Liftgate

Schematic Reference: Door Lock/Indicator Schematics
Connector End View Reference: Power Door Systems Connector End Views
1
Did you perform the Diagnostic System Check - Vehicle?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
Activate the door lock switches to the lock and unlock positions.
Do both rear passenger doors lock and unlock?
YES - Go to Step 3
NO - Go to Power Door Locks Inoperative
3
Did the liftgate lock actuator lock and unlock?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 4
4
Disconnect liftgate door lock actuator.
With a test lamp connected to a good ground, probe the door lock actuator lock circuit at the door lock actuator harness connector.
Activate a door lock switch to lock position.
Does the test lamp illuminate?
YES - Go to Step 5
NO - Go to Step 7
5
With a test lamp connected to a good ground, probe the door lock actuator unlock circuit at the door lock actuator harness connector.
Activate a door lock switch to unlock position.
Does the test lamp illuminate?
YES - Go to Step 6
NO - Go to Step 8
6
Inspect for poor connections at the harness connector of the door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 10
NO .. Go to Step 9
7
Repair the open door lock actuator lock circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 10
--
8
Repair the open in the door lock actuator unlock circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 10
--
9
Replace the liftgate door lock actuator. Refer to Door Lock Actuator Replacement in Body Rear End.
Did you complete the repair?
Go to Step 10
--
10
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

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4 Answers

99 Ford explorer Door Lock


OK. Now I have come across this myself and have done the following to fix it. First you need to know if the power door lock actuator is bad or not. If the driver door locks and unlocks with the inner driver door main control switch then it is not bad. If not then try to replace this component. To do this you will need to remove the door panel. It is not that hard. Many tutorials online that can help with this. It is easier then you think. Pull back the inner water seal from the door frame to gain access to the inner working of the door. You will need to remove the window track that is in front of the actuator to remove it easily. If not then you will have a very hard time trying to figure out how to get it out. There is a bolt that hold the bottom half on that needs to be removed. It comes out and re installs very easily. Disconnect the wiring from the actuator before you try to remove it. You will need to remove the rivet located on the outside of the door that holds the actuator in place. Drill this one out. This needs to be removed so the old actuator can be removed and you can install a new one. This rivet is heavy duty is going to be 1/4" You must not use a nut an bolt or a plastic rivet to reinstall the new actuator for the nut an bolt can come loose and cause failure and the plastic one can break very easily due to the power that is exerted by the actuator. You will have to get a heavy duty rivet gun for this as well for the standard ones are too small. They can be had at Harbor Freight for like $20.00 and comes with all the different size rivets too. To re install the new actuator just reverse the process. If this does not fix it then the problem lies with the door cylinder contact switch. This switch is mounted on the Keyed door cylinder and is connected to the power door lock actuator. It sends a signal to the actuator to lock or unlock when you turn the key. It also controls all the the other doors as well. I am not certain how much this is but I do know it can be purchased at most auto parts stores. I have also found that the door latch receiver mechanism can go bad too. The key will lock the driver side door but wont unlock the driver side door. The only way to open the door was to go to the other side or the rear driver side and use the inner door lever. This can be a costly fix and is not easy to replace by yourself. It is very difficult to remove and can be a lengthy job at that if you are not to familiar with these types of assemblies. If you are not careful you can also break the inner door handle by pulling too hard and that is not cheap to replace either. If you do not want to try to do this yourself then let someone who knows how to do it do it for you. It can be a very aggravating job if you are not used to it. If your key is not turning in either direction on any of the locks then the tumblers are jammed and need to be lubed up to operate properly. This is very easy to do and won't take much time. To remove the key lock from the door you need to remove the lock ring on the cylinder to disengage the door lock mechanism and then pull the flex plate that holds the lock in the door. After that insert your key to see if the tumbler slides are moving freely. If not then spray it with an all purpose oil or grease so you can loosen up the tumblers slides. They should be visible on the underside of the lock. Work the key in an out slowly till you see all the slides move easily and watch to make sure that they go back in to place when you remove the key. That's all there is to it. If any of the tumbler slides are damaged then you need to take it to a lock smith and have him replace the bad slides. Should not cost that much and will save you some money as well instead of paying for a new keyed lock which will also change your key to that door and will not work in the other ones. Hope this helps

Sep 14, 2008 | 1999 Ford Explorer

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