How to Replace Door Lock Actuator 02-06 Chevy Trailblazer

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1A Auto shows you how to repair, install, fix, change or replace a broken or snapped rear power door lock actuator. This video is applicable to Chevy Trailblazer and GMC Envoy, years 02, 03, 04, 05, or 06.

This process should be similar on the following vehicles:
2002 Chevrolet Trailblazer
2003 Chevrolet Trailblazer
2004 Chevrolet Trailblazer
2005 Chevrolet Trailblazer
2006 Chevrolet Trailblazer
2007 Chevrolet Trailblazer
2008 Chevrolet Trailblazer
2009 Chevrolet Trailblazer

🔧 List of tools used:

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⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

[AAuto]

√ *Watch the Video*
√ *Do it Yourself*
√ *Save Money*

[WUWC]

Thank you. It's always nice to see someone else dive into things like this before I give it a try.

[Sabanator]

Thank you for your video I used it to change the door lock on my 02 TB. I also purchased the door lock from 1A because of the video you spent time helping us all.

[tommytruelick]

That's guy. Your video saved the day for me.

[Ralphieisthegreatest]

Good video! Love the land yacht in the next stall!!

[KXR]

Great video! Thanks for posting. It was a huge help.

[ironman]

Thank you for the explanation/response and all the excellent videos !!

[scotttrujillo]

Excellent video! Just replaced my drivers door lock assembly on my 2008 Trailblazer SS that was having intermittent door ajar / dome light on issues and installation was a breeze. Thanks!

[teenrev]

Thank you for this video... it just saved me a ton of money.

[AAuto]

If the door lock actuator fails or starts to fail, when you hit the switch it may make a noise and kind of wiggle but may not move up or down. That's typically what happens to them when they go bad. It sounds like the latch could be bad in this case. If should hold the door shut. Hope this helps you out. Have a great day! 1aauto.com 888-844-3393

[KinggColtt]

Hi! I’ve been a customer before and I don’t see door latch a door latch assembly for a 2004 blazer? I can’t even find it on any other auto parts sites. Are these not being made anymore??

[Kephers]

Looking for one for a 2005 gmc sierra. For the actuator/cyclinder replace. Someone shoved a screw driver into the key lock. So we replaced the cylinder, but when you put the key in, there is no resistance at all. You turn any way and it doesnt lock/unlock. But it works with the key fob.


Any ideas?

[MrClownstastefunny]

The part shown in the video isn't the part listed in the link. The one in the video has 3 pulgs and the linked version only has 2. My trailblazer is the 3 plug version, do you have a link to that one?

[billridings]

Great video. when in the 06 Trailblazer, and the radio is on, if you open the Drivers side front door, the radio does not shut off. But opening the passengers front, the radio turns off. I’m thinking it’s the door lock actuator. Any Ideas? Thanks

[AAuto]

@superskunk311 You may want to have the dealer run your VIN # on the truck for you to see if your Chevy Trailblazer takes a different size.

[donminer]

DO you happen to have a video on this procedure for a 2004 tahoe, drivers door???

[jefffrank]

Is this the same procedure for the trailblazer SS ? And I was told that I have to have a dealer program my door lock after it’s replaced...????

[xXJthrillaXx]

i have a 2005 trailblazer ls. i got my key stuck in the car and while i was usuing a slim jim to get it unlocked, i heard something snap and now when i put my key in the door to unlock it, i wont lock or unlock. its like there is no resistance to the turning of the key. is this the door lock actuator? or something else?

[HappyHounds]

I came home today and when I let my dog out the driver rear door, it wouldn't shut again. I made sure the latch wasn't stuck, but even with it opened, the door will not close. The latch and striker seem to line up perfect. The latch does not seem to lock in either a open or locked position. Would this be an indication I need a new latch assembly? Possible a spring broke or something? I am having a hard time finding a driver side rear latch assembly for a 2004 Envoy xl. The actual lock actuator seems to be functional still.

[rileycastro]

when unlocking and locking the car with a key, does it use the door lock actuator? cause I am unable to unlock my door with my key.