- C6 Corvette Total Recalls and Technical Service Bulletins
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Steering Column Lock FAQs - please read before you post (sticky please)
You can sort it out yourself at a relatively small cost if you have a few basic skills and a few tools such as Torx drive screw drivers and a digital multimeter and wrenches that will allow you to replace the battery. If you need specific help/information/direction PM me and I can provide that. If you didn't live nearly 2000 miles from me I'd come over and help or do it for you.
I know the battery starts the car because you are driving it. But most likely the battery is the cause of what you are seeing/experiencing. When you have time I would do the voltage tests I described above. I think I would find the time to do that sooner than later before you are left stranded by the column lock system. It happens.
Thanks for your time and I will gladly PM you if I run into a problem.
Recall done on an 04 Z where the column still locks means that the PCM has been programmed to shutoff fuel at 2MPH when the BCM thinks the column is locked after it has requested an unlock.
Causes for that MOST likely is the battery but a fried Column Lock Relay can also cause the symptoms. You can measure the NO LOAD voltage ( voltage across the battery posts with the Neg battery cable disconnected) and it needs to be greater than 12.5 volts for the column lock electronics to function correctly. Car will start with as little as 12.2 volts no load BUT the column lock system WILL fail so you get the messages, Column may not unlock and 2mph fuel shutoff may be set. Voltage after the car starts is too late as the column lock system runs BEFORE the engine starts...
You can try charging the battery fully and see if it will hold a charge. A good battery at full charge measures between 12.7 and 12.9 volts or more (no load). Battery voltage on the dash guages does NOT indicate the state of health of the battery. It indicates the state of health of the charging system. With engine running it indicates the output voltage of the alternator. With key on and engine off it has little meaning since many electrical systems are loading the battery.
Only way to know if the Column Lock Relay is good (your car should NOT have a GM K Harness) is to see if the battery being charged corrects the column lock symptoms or to bench test the Column Lock Relay. CLR is located in the passenger footwell to the left of the IPC fuse box and above the BCM (large silver box). The wires in the wiring base identify it as the CLR, 2 orange, 1 white, 1 green and 1 purple.
I suggest that you install a CLB to avoid this problem in the future.
Battery is the OEM 86 6yr. I just checked the battery with my multi meter and it showed 12.43 volts. The car has always started and operated just fine, and when I just started it, error popped up, but when I scanned it, it showed no trouble codes. Do you guys think replacing the battery will stop this?
Battery is the OEM 86 6yr. I just checked the battery with my multi meter and it showed 12.43 volts. The car has always started and operated just fine, and when I just started it, error popped up, but when I scanned it, it showed no trouble codes. Do you guys think replacing the battery will stop this?
My steering column was serviced prior to this and I thought the problem was resolved with the GM recall.
I had to have the car flat bedded to a Chevy dealership.
I contacted a GM rep to complain about my problem with no success. They said it was a relay that had worn out and there was no restitution.
The dealership made the repair at a cost of $300.00 and I haven't had a problem since.
I had no problem with my battery.
I wish you the best.
Mitch
I had the remove key wait 10 seconds error then the "Service Steering Column Lock" message. Car would start but would cut off at 2.5 mph.
I tried all tricks of removing fuses, disconnecting battery and so on...
What I found was first recall removed locking plate and added K harness. All was good for 2 years
Then same issue. Towed to dealer. K Harness failed but locking motor still cycled, So Then dealer (last year) only removed K Harness and allowed motor to cycle.
Last week Same issue...This time the lock motor quit working causing same error. Luckily I was in my garage.
This time I heard about Compliance Parts (complianceparts.com) and the LMC5 MODULE. I called and talked to Richard in Tech Support, he was a GREAT help. I bought the LMC5 MODULE and had it next day shipped $40+shipping. (855) 565-8388
Needless to say it arrived, it was a super easy install and I am up and running with NO ISSUES.
I wouldn't normally bragg or advertise about this but because it was a pain in the butt trying to figure this out and the Fix was so easy and simple to install. (Plus Richard at Compliance was awesome)
I wanted to share this hoping it can help someone else with this issue
I had the remove key wait 10 seconds error then the "Service Steering Column Lock" message. Car would start but would cut off at 2.5 mph.
I tried all tricks of removing fuses, disconnecting battery and so on...
What I found was first recall removed locking plate and added K harness. All was good for 2 years
Then same issue. Towed to dealer. K Harness failed but locking motor still cycled, So Then dealer (last year) only removed K Harness and allowed motor to cycle.
Last week Same issue...This time the lock motor quit working causing same error. Luckily I was in my garage.
This time I heard about Compliance Parts (complianceparts.com) and the LMC5 MODULE. I called and talked to Richard in Tech Support, he was a GREAT help. I bought the LMC5 MODULE and had it next day shipped $40+shipping. (855) 565-8388
Needless to say it arrived, it was a super easy install and I am up and running with NO ISSUES.
I wouldn't normally bragg or advertise about this but because it was a pain in the butt trying to figure this out and the Fix was so easy and simple to install. (Plus Richard at Compliance was awesome)
I wanted to share this hoping it can help someone else with this issue
The Best of Corvette for Corvette Enthusiasts
Thanks for your time and I will gladly PM you if I run into a problem.
Last edited by RW Foster; May 14, 2013 at 12:13 PM. Reason: misspelling

BTW, this is what I got back from Gene Culley (Thanks, Gene!
Product Safety Recall N040006 04006 ELECTRONIC COLUMN LOCK SYSTEM 04/19/2004 Closed
And a huge thanks to 8VETTE7. You rock!!



99 FRC - 6 Speed
I installed the CLB last October and everything was running fine until yesterday while I was on my way to help a friend test drive some C5's since he is in the market to purchase one...Definitely not the best time for the steering column to go out again!!!
Battery was replaced with an Optima Red Top about 3 weeks ago.
I'm going to check Fuses #23 and #25 for the BCM tonight after work.
Any other recommendations on what else to check and what my next steps should be?
Thanks
I think I removed the K harness per your instructions this thread, I will have to check once I get home. Not sure about the bypass, I will also check once I get home.
After checking, there was no K harness, I removed that during the initial install, however there was the purple spliced wire with no bypass. I will install the bypass this weekend since I couldn't find any extra wire in my garage. Hopefully that will eliminate this issue once and for all.
A quick question: Are the CLB's prone to burnout or not function well over time? My tuner was telling me that they will eventually burnout and stop functioning over time.
Last edited by DefMunkie; Jun 18, 2013 at 10:33 AM.

99 FRC - 6 Speed
I installed the CLB last October and everything was running fine until yesterday while I was on my way to help a friend test drive some C5's since he is in the market to purchase one...Definitely not the best time for the steering column to go out again!!!
Battery was replaced with an Optima Red Top about 3 weeks ago.
I'm going to check Fuses #23 and #25 for the BCM tonight after work.
Any other recommendations on what else to check and what my next steps should be?
Thanks

The repair is simple. Install a LMC5 and never have trouble again. It is install right at the BCM and bypasses the entire problem. You also no longer have a car sensitive to low voltage issues. You now can trust the car like you should be able to. They are sold here and on ebay.
So, you get in your car, put the key in the ignition, turn the key to start the car and get the DIC message that the column is still locked. You try and turn the steering wheel but sure enough it is still locked.
What has worked for me is:
Turn the car off
Remove the key
Column is still locked
Put hands on the steering wheel at 10 and 2 o'clock
Try to turn left and right quickly and semi forcefully 3 or 4 times
The steering wheel won't move much when you do the step above
Put key back in the ignition put don't turn the key at all
Put your left hand on the steering wheel at 2 or 3 o'clock, palm facing you, you are grasping the inside of the steering wheel
While pulling down with quite a bit of force on the steering wheel with your left hand, like you are trying to turn to the right, very slowly turn the ignition key as if to start the car.
The steering column should unlock before you have turned the key far enough to start the car.
If it doesn't work the first time try again as this technique works quite often, maybe apply more downward turning to the right force on the steering wheel. You won't hurt anything.
If it does work, if probably won't lock up again if you leave the key in the ignition. Call Corvettes of Houston and have them overnight a Column Lock Bypass to you. Take 15 minutes and install the bypass.
This technique is mentioned in other posts but I thought bringing it out to its own post might save people some serious grief.
Go D'Backs
David in AZ .
Probably had all the column lock recalls.
4 CL failures in 9 years, but new battery always SEEMS to fix it, except last time.
Recent failure, new battery, but the only way to unlock column was to hook up jumper cables for a few minutes and pull hard on wheel. Two weeks later it locks again. Jumper cables on it for a few minutes and finally got unlocked.
Tonight I installed CLB per instructions.
Plug in cigarette lighter harness to disengage CL.
Instructions say "Turn key on momentarily"
Column lock unlocks as soon as key is inserted all the way, but I turned key to on and then back off.
Plugged in CLB. Key in and got "wait 10 sec" message on DIC.
Pulled fuses 25 & 29 and waited about 5 minutes and reinstalled fuses.
Warning message seems to have gone away, but it hard to tell as the DIC display is now mostly gibberish.
What now?
The CLB has been in the glove box for 2 years, because I thought CL failures were only result of dying battery and I'm stubborn.
Jumper cable from another running car seems to be a good work around to get CL motor to unlock. Tonight I gave up and installed CLB because the CL was working and motor would retract pin.
Not proven facts, but merely my observations:
CL failures seem to be almost random and temporary.
Low voltage to motor but not sure what causes that. Dead battery for sure, but there seem to be other factors.
All my CL failures were in hot humid weather
#1 washing car in driveway. Jerked around on steering wheel and problem went away. 2 weeks later battery went to zero volts & had to be replaced.
#2 three years later, hot and rainy evening, failure, so I tried every trick and then installed a new battery. Still locked, it was late, so I abandoned the car on street overnight. The next morning early, it unlocked and no problems for another 3 or 4 years.
#3 Was a few weeks ago. Hot and humid. Tried all recommended tricks to no avail. Then tried to install CLB, which did not work. Ended up buying a new battery. That had no effect other than to drain my wallet. The car was in a strip mall and I did not want to leave it overnight. As a desperation move I jumped the Corvette from another car with engine running. My theory was that the system would see 13 or 14 volts instead of 12.6 +/- volts and it seemed to work.
#4 was last Thursday and again it was hot and humid and I was stuck in a parking lot. Wife came with Mini and jumper cables and we got it unlocked in a few minutes.
We'll see how the CLB fares.
plugged it in and my headache was gone...no more pull key...problem was gone...I hope this is the prob for you.If anybody has any other questions as to what i did please e-mail me at harly152@aol.com
Good luck
Steve













