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TSB (#18-NA-346) recall

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Old Jul 14, 2025 | 01:43 PM
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Default TSB (#18-NA-346) recall

Hey guys, I’m looking into a 2005 c6 with a manual transmission and have heard of the steering column lock failing. I recently found that GM put out TSB (#18-NA-346). My question is to those who have gotten this done. Did it really work with no reoccurring issues? Any drawbacks to it? I just don’t want to throw money at it knowing it will break again. Thanks for the replies!
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Old Jul 14, 2025 | 09:05 PM
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I just had this TSB done (partially) 2 weeks ago. Only the new BCM utility file was updated, I asked the dealer to not bother with the lock ring change as I saw little benefit of opening up the column and messing round in there. My dealer only charged $90 for the BCM update! Others have done this approach as well.

I had originally put a column lock eliminator on the car last year the first week I bought it. I never had an actual issue but the BCM update is a better fix as the eliminators can fail.

I've only had my 2005 for a year.... Zero issues. Good luck with you search.
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Old Jul 14, 2025 | 09:51 PM
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Thanks for the info! So are you saying with the BCM update the column lock won’t fail? And what did you say to the tech when you sent it in to get it done?
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Old Jul 14, 2025 | 10:24 PM
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Originally Posted by Pbot18
Thanks for the info! So are you saying with the BCM update the column lock won’t fail? And what did you say to the tech when you sent it in to get it done?
My understanding is that with the BCM update done there can never be a command sent to engage the column solenoid/lock pin into the lock ring. It would take some other "force" to make the lock pin move and engage into the ring. I decided that was not a big enough risk to worry about so I left the lock ring in place. You can find the update lock plate on eBay and change it out yourself otherwise gotta pay the dealer.

I simply told the service writer the tsb number, he looked it up and after discussion he understood exactly what I was wanting. That said its a crapshoot as some dealers won't even service 10 year old cars. I'm in a rural area and the dealer happens to be very good.
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Old Jul 15, 2025 | 03:04 PM
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Read,

https://static.nhtsa.gov/odi/tsbs/20...55118-9999.pdf


Short version, steering wheel is pulled, and the locking ring that the steering lock use to lock into, is replaced with a ring that the lock tab when fired out in the lock postion will not lock in.

The BCM is reflashed to pull the entire steering locking system out of play, without having to remove the parts for the car.

As for why the TSB now, instead of decades ago when the locking system would run into problems, GM ran out of parts to replace parts of the steering lock system, and the solution now (and what should have been the solution from the start, is the current method to solve the problem.

As for cost if you do it yourself, not hard to pull locking disc and lathe it, or just buy the replacement at less than $20,
and if you have tech 2 (or clone) can get a Ac Delco account for the car to use TDS for reflash the BCM with TDS SPS for $45.

Hardest part of the job, is just getting the old lock ring of, and then mod/new one back on,


Primer for what your in for,
https://www.diyauto.com/manufacturer...ement-by-csnow

To add, your location would help, since not a hard job, and someone like myself that is tooled up, could give you a hand to make short work of it, including SPS flashing the BCM as well in the end.
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Old Jul 15, 2025 | 07:32 PM
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Originally Posted by Dano523
Read,

https://static.nhtsa.gov/odi/tsbs/20...55118-9999.pdf


Short version, steering wheel is pulled, and the locking ring that the steering lock use to lock into, is replaced with a ring that the lock tab when fired out in the lock postion will not lock in.

The BCM is reflashed to pull the entire steering locking system out of play, without having to remove the parts for the car.

As for why the TSB now, instead of decades ago when the locking system would run into problems, GM ran out of parts to replace parts of the steering lock system, and the solution now (and what should have been the solution from the start, is the current method to solve the problem.

As for cost if you do it yourself, not hard to pull locking disc and lathe it, or just buy the replacement at less than $20,
and if you have tech 2 (or clone) can get a Ac Delco account for the car to use TDS for reflash the BCM with TDS SPS for $45.

Hardest part of the job, is just getting the old lock ring of, and then mod/new one back on,


Primer for what your in for,
https://www.diyauto.com/manufacturer...ement-by-csnow

To add, your location would help, since not a hard job, and someone like myself that is tooled up, could give you a hand to make short work of it, including SPS flashing the BCM as well in the end.
thanks for the reply. I’m located in Vancouver Canada. I think I should be able to do it myself. Just to set the record straight this is a permanent fix? I’m just wondering because lots of people have told me there’s really no way to get rid of it completely. Appreciate all the info guys!
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Old Jul 15, 2025 | 09:03 PM
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My 2005 never gave me any issues but I was aware of the issues that could happen when it fails. There are many experiences on this forum stating the problems that can happen when it fails. The TSB is a permanent fix for this issue. I had this procedure completed on my car by a dealer three years ago. No problems. Glad I had this done.
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Old Jul 16, 2025 | 03:57 PM
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Thanks for the reply. So would I be okay with just flashing the BCM to ignore the column module? Or should I replace the part and flash the BCM?
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Old Jul 16, 2025 | 09:46 PM
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I replaced my column lock in 2010. Unfortunately it was a few weeks before the bypass module came out. Still a little bitter about it but it is what it is. 15 years and 60-70k later, no issues. However, 8f you have the drive and the means, I would do it. Prior to the TSB, the solution was to replace parts so there was no permanent fix. Since parts are unavailable, it's now been made a permanent fix by actually shutting it off in the bcm.
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Old Jul 17, 2025 | 03:38 PM
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Originally Posted by Dano523
Read,

https://static.nhtsa.gov/odi/tsbs/20...55118-9999.pdf


Short version, steering wheel is pulled, and the locking ring that the steering lock use to lock into, is replaced with a ring that the lock tab when fired out in the lock postion will not lock in.

The BCM is reflashed to pull the entire steering locking system out of play, without having to remove the parts for the car.

As for why the TSB now, instead of decades ago when the locking system would run into problems, GM ran out of parts to replace parts of the steering lock system, and the solution now (and what should have been the solution from the start, is the current method to solve the problem.

As for cost if you do it yourself, not hard to pull locking disc and lathe it, or just buy the replacement at less than $20,
and if you have tech 2 (or clone) can get a Ac Delco account for the car to use TDS for reflash the BCM with TDS SPS for $45.

Hardest part of the job, is just getting the old lock ring of, and then mod/new one back on,


Primer for what your in for,
https://www.diyauto.com/manufacturer...ement-by-csnow

To add, your location would help, since not a hard job, and someone like myself that is tooled up, could give you a hand to make short work of it, including SPS flashing the BCM as well in the end.
Dano - do you know where to get the replacement locking ring? Or at least a part #?
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Old Jul 17, 2025 | 03:49 PM
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So this is the reason there is no column lock in the later years C-6's. Interesting.
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Old Jul 17, 2025 | 05:55 PM
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Originally Posted by schizcat
Dano - do you know where to get the replacement locking ring? Or at least a part #?
Again, click the link below that I posted in the first post, and scroll down in it and it gives you the non locking ring plate number.

https://static.nhtsa.gov/odi/tsbs/20...55118-9999.pdf

Also, it give you photos of both, and if you know anyone with mill, not hard to just mill the old ring, into the new needed none locking rig plate.
And yes, the plate is needed, since it functions as a spacer as well.
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Old Jul 22, 2025 | 07:26 AM
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I put in two bypass modules and both failed eventually, i then had the TSB done at the dealer, that was a couple of years ago and probably 15k miles, solved the no start issue.
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Old Jul 23, 2025 | 05:04 AM
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Originally Posted by RoadkingC6
I put in two bypass modules and both failed eventually, i then had the TSB done at the dealer, that was a couple of years ago and probably 15k miles, solved the no start issue.
Yep, ,steering lock eliminators work if the problem is just the steering lock itself (broken cable or binding gears in the lock mech), but not when the problem is the steering lock module that can go south as well, that the steering lock plugs into.
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