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Steering Column Lock FAQs - please read before you post (sticky please)
Coincidentally while the car was at the same Chevy dealer last week for unrelated service, the column lock issue reappeared. "Pull Key Wait 10 Seconds" message appears when first inserting the key, then "Service Column Lock" message when inserting key again. Car starts then stalls when attempting to drive it.
The dealer tested the battery and found a dead cell and recommended replacing the battery stating that the lock problem can be caused by low battery voltage. This did not solve the issue. Dealer's next recommended solution was to replace the column lock actuator and remove the ECL harness previously installed to the tune of $800. Dealer would not guarantee this would fix the car but claimed they performed this fix on a corvette previously and it solved the issue. Not wanting to spend that much cash with no guarantees, I paid for the new battery installation and had the car towed back to my house to research the issue further since the dealer offered no other possibilities.
I welcome any suggestions on how to fix this.
Thanks
www.complianceparts.com
When you get the LMC5 and install it do the "brown wire mod" described on page 2 of the install instructions as "optional". Do it anyway and avoid having to be back there a second time when you start getting the "pull key and wait..." message.
LMC5 abandons all factory and recall wiring after the BCM so you don't have to worry about the K harness or anything else. LMC5 is the only permanent fix to the C5 column lock symptoms.


I had planned on having it toward to the dealer until I found so much info about it. I'd really appreciate any insights anybody can provide.
Does GM provide a way for me to look up my car by VIN see if the column lock recall has been performed?
Last edited by Tyrrell; Mar 26, 2019 at 01:22 PM.
Thanks,
Parker
The Best of Corvette for Corvette Enthusiasts
Hi
New owner of a 03 c5 z Corvette and unsure if any work of column lock in past.
No problems since l have had in last 3 months but want to be sure of what l have.
All l know is with key out steering wheel turns freely.
And these two photos of BCM wires that don't look standard?
Any help please would be great full before l look into buying a LMC5
Thanks
Karl.
-J
Like most, I thought the column lock situation had been discussed to the point that nothing more could be said. I have, however, come up with a situation that I have searched for an answer at length but came up with nothing either here or the internet in general. A little background. I bought my wife a 99 a few years ago and within the first year got the service column message. I bought the the black box CLB that mounts under the steering wheel and never looked back. Has worked 100% perfect. Fast forward. I found a bargain in a 1998 M6 that was in very good condition, especially for the money so I bought it. The column lock worked as expected with no messages, locking and unlocking exactly as it was designed. Having gone through the issue on my wife's car, I put a column lock bypass on the winter project list. Either the LMC5 was not available when I did hers, or I didn't know about it, but I really liked the idea of it being mounted right at the BCM and bypassing all the wiring. On top of that, by all indications the customer service from Compliance Parts was second to none. That being the case, I went tith the LMC5.
I will be the first to admit that I am not a top tier mechanic, HOWEVER I can follow instructions and the LMC5 installation is very straightforward. After checking, rechecking, and repeatedly recehecking my rechecks I am confident it is installed correctly. After the installation, I get the "PULL KEY, WAIT 10 SECONDS" repeatedly. I have not actually counted the number of times, but it occurs over 90% of the time. I've checked fuses and installed a brand new battery.
So here is the question that all the background leads to: Will the brown wire mod resolve this on an early build 1998 M6 WITHOUT a relay? The LMC5 instructions state to do the mod if " ...and your c5 has the steering colum lock relay monted above the BCM..."
I know what the obvious answer is, which is also a part of the reason I went with the LMC5, and that is "Call Compliance Parts...they are very helpful." I have no doubt that may be the norm, but I have both emailed and called and left a message and have received no communication back from them. Ordinarily I would not be in quite so big a rush, but I have until 2/22/20 to return the part for refund. If I don't hear back from Compliance or get an answer from the cumulative knowledge of this forum, I'll probably get one of the other CLB and move on.
Many thanks in advance to anyone who can help. Likewise, my apologies if this very specific situation has already been adressed, but if it has, I surely could not find it,
--J
Last edited by ymerejsregor; Feb 20, 2020 at 01:59 PM.
-J
--J
Sorry I know this is a well talked about item but I am a new C5 owner and there is a lot of information but not sure where to start?
Last edited by Orange_Madness; Sep 26, 2020 at 10:58 PM.




Might try the fuse 25 mentioned above but wondered how your outcome has been.
I've read on this thread that the CLB (which I have installed) can damage relays within the BCM over time so this might be part of the issue. A new isn't terribly expensive so I might try replacing it, but I want to get confirmation before I spend $150+ on one of those.











