Service Column Lock - error code
Thread Starter
1st Gear
Joined: Oct 2019
Posts: 1
Likes: 0
From: Tallahassee, FL
Service Column Lock - error code
I've owned my C5 Coupe for 3 years with no challenges until recently. Turned 100,000 while participating in National Corvette Caravan in August. While in Bowling Green, came out to parking lot and got this error code on start up. Car starts but shuts off at 2 mph. Had it towed to dealer. They couldn't duplicate the problem and I drove back to Museum. Drove to dinner that night, came out after dinner and I'm stuck again . Had it towed a second time to dealer. Again, could see history of error codes, but couldn't duplicate. I got on the road and drove back to FL, never turning engine off. Have driven twice since returning with no issues. Now, I'm getting this error code again and been stuck in the garage for last 2 weeks. Dealer was able to determine that the original recall and a subsequent update had both been done. Is anybody familiar with this problem and can offer advice?
Melting Slicks
Joined: Sep 2008
Posts: 3,142
Likes: 802
From: Espanola New Mexico
Many posts and threads on this problem here on the forum, verify you have a good battery with 12.5volts, you might want to change the column lock relay. Most forum members will advise you to install a LMC5 and do the brown wire modification, which most of the time will take care of the service column lock problem you are experiencing.
Melting Slicks
Joined: Aug 2013
Posts: 2,491
Likes: 315
St. Jude Donor '15-'16-'17-'18-'19-'20-'21-'22
I am not really surprised the dealer could not find the problem.
http://complianceparts.com/lmc5ataglance.html
http://complianceparts.com/lmc5ataglance.html
Instructor
Joined: Oct 2016
Posts: 143
Likes: 31
From: Indiana
Thousands of posts about column lock. If you have a column lock problem, the last place to take your car is a dealer. My brother took his C5 to a dealer for a column lock issue and they threw up their hands and said they would try replacing some parts for $1200. He called me and I said to quickly get out of the dealership and order a LMC5. He did that and all is good now.
Le Mans Master
Joined: Jul 2014
Posts: 6,671
Likes: 273
From: Jax, Fl
Many posts and threads on this problem here on the forum, verify you have a good battery with 12.5volts, you might want to change the column lock relay. Most forum members will advise you to install a LMC5 and do the brown wire modification, which most of the time will take care of the service column lock problem you are experiencing.
Thousands of posts about column lock. If you have a column lock problem, the last place to take your car is a dealer. My brother took his C5 to a dealer for a column lock issue and they threw up their hands and said they would try replacing some parts for $1200. He called me and I said to quickly get out of the dealership and order a LMC5. He did that and all is good now.
Safety Car
Joined: Mar 2017
Posts: 3,774
Likes: 940
From: Orlando Florida
Installed one last week. Fixed my ride right up. Second worst part was waiting for the kit in the mail. First worst was trying to de-pin factory connectors -- got one wire de-pinned/re-pinned, gave up on the other two and cut and soldered instead.
Burning Brakes
Joined: Feb 2013
Posts: 904
Likes: 296
From: Sacramento, California
Steve
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
FIRST,, MAKE SURE that you have a 100% good battery. Take it out, charge it and then have it tested at the auto parts store. If it isn't 100%, replace it with the proper battery with at least 120 ma/hour RESERVE CAPACITY. You may have to replace the battery with a group 78 battery to get the proper reserve capacity battery.
Once you have the battery sorted out, check to see if you have the OEM GM Column Lock harness installed between the cars column lock harness connector and the column lock motor/lock assembly. Its a small four pin connector.
If you do, REMOVE IT! Its a piece of crap and is a common point of failure. Reconnect the column lock harness to the column lock motor assy pig tale harness.
NEXT.. Get the LMC-5 and install it!
Once you have the battery sorted out, check to see if you have the OEM GM Column Lock harness installed between the cars column lock harness connector and the column lock motor/lock assembly. Its a small four pin connector.
If you do, REMOVE IT! Its a piece of crap and is a common point of failure. Reconnect the column lock harness to the column lock motor assy pig tale harness.
NEXT.. Get the LMC-5 and install it!
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