After reading pages and pages on google, this seems to be a VERY common issue. So I had a few of the Edmunds members send me their bad actuators.
Upon cracking open the actuators sent to me, I quickly found the culprit :
A Chinese made electric motor which probably cost GM about 10 cents a piece. They got what they paid for … very poor reliability.
Post #120 shows pics of the faulty electric motor
My GM dealer has replaced all of mine under warranty and wouldn’t let me see what came out.
Thankfully, I have been able to source a much higher quality electric motor to swap in. The repair involves drilling out the case rivets, opening the actuator case, replacing the faulty Chinese motor with a high quality unit, then putting the case back together and TIG welding the lock bracket back in place.
If anyone is interested in learning more about the repair, and possibly sending us their faulty GM door lock actuators units for us to repair free of charge in exchange for testing our repaired actuators, please contact me :
The problem seems to be occurring on just about every GM product from 2007 on. So, there are likely additional part number GM door lock actuators using the identical inferior electric motor that we could also replace. Please post in this thread any information you have on the topic so all can see.
www.GruvenParts.com specializes in fixing similar issues on Audi/BMW/VW stuff, but now since I have 3 kids and a new (to me) 2008 Tahoe Hybrid, I have begun tackling issues on this truck as well.
If there are other problems with this vehicle (or other GM products), let me know. We are always looking at building new products to make our vehicles better. Freebies to anyone who brings us new product ideas and can help design/test samples.
I have had 2 fail so far but my problem was they failed in unlocked position. I was locking the car but both back doors remained unlocked. sounds like a safety recall GM!!!!! after all you made 1.3 billion in profits last year.
I highly doubt they will issue a recall for this. The doors can still be locked or unlocked manually, it is just a pain in the a$$. If I was a car thief I would certainly target post 2007 GM's because 9/10 will have a faulty door lock that was left open. Would make for easy grab.
Ive already reported the issue to NTSB, it pretty much fell on deaf ears (although I encourage everyone to do the same).
Ive been back and forth with reps at GM for over a year. Everyone knows about this issue that needs to know about it from GM's standpoint.
Their stance : Do nothing and keep making $ off the $400 repairs.
Its not just Tahoe that this is happening on. Its most GM products after 2007.
I think they have replaced the old ones with an improved one. Because when mine failed two weeks ago after traveling with passengers trying to pull the handle while the lock is still engage, they actually replaced the whole lock assembly(?).
I thought that Gruven sounded familiar I think I've ordered there before.
Anyways, If mine go bad I'd like to be able to replace the bad parts. Would you be willing to sell the motors, or give out the manufacturer info?