Start immediate shut off
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
Start immediate shut off
So to start i posted another thread about a week ago and still haven't come across anything or anybody that can relate except for one guy Lol. My 01 zo6 got the service column lock service message so I bought the lmc5 installed it and nothing. Soon after I spoke to Richard at compliance parts he told me I may need to swap my battery out. So I bought a new battery and still nothing. The weird thing is the car will start though after I let the systems reset or when the car doesn't pop the service column message. So sometimes I can start it multiple times no issue or only once then the message pops up. I seen that a guy looked at his PCM with a tech 2 and it showed that the C5 will disable fuel if both the abs light and column steering lock are both active but i'm not sure how reliable that is. If anyone could help It would be so appreciated.
Melting Slicks
Joined: Sep 2008
Posts: 3,129
Likes: 799
From: Espanola New Mexico
The BCM does send a password to the PCM which then enables fuel delivery. Your BCM may be seeing a fault condition from the column lock sometimes, might consider sending the BCM out to have it tested, and paying a auto electric shop that has the right diagnostic equipment to determine what is causing the start and stall.
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
The BCM does send a password to the PCM which then enables fuel delivery. Your BCM may be seeing a fault condition from the column lock sometimes, might consider sending the BCM out to have it tested, and paying a auto electric shop that has the right diagnostic equipment to determine what is causing the start and stall.
Drifting
Joined: Mar 2018
Posts: 1,365
Likes: 414
From: New Jersey
The service column lock error allows the car to start, it just can't be driven due to the 2 mph cutoff. So if you car isn't starting, its a different issue. Does your security light go out? If it's on it won't start. Make sure there are no codes set in the DIC. When your car stalls you should read the DIC. If the an error was detected with the column lock one of the following codes should be set:
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
Last edited by C5MSG2004Vert; Jan 25, 2026 at 09:59 AM. Reason: clarify
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
The service column lock error allows the car to start, it just can't be driven due to the 2 mph cutoff. So if you car isn't starting, its a different issue. Does your security light go out? If it's on it won't start. Make sure there are no codes set in the DIC. When your car stalls you should read the DIC. If the an error was detected with the column lock one of the following codes should be set:
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
The service column lock error allows the car to start, it just can't be driven due to the 2 mph cutoff. So if you car isn't starting, its a different issue. Does your security light go out? If it's on it won't start. Make sure there are no codes set in the DIC. When your car stalls you should read the DIC. If the an error was detected with the column lock one of the following codes should be set:
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
B2587 Column Lock/Unlock Drive (A)
B2588 Column Lock/Unlock Drive (A)
B2592 Column Lock/Unlock Drive (B)
B2583 Column Lock/Unlock Drive (B)
Apparently there is a issue where the if the ABS and BCM DTC are both set fuel will be disabled after 5 seconds of running and won't start again without key cycled off. Got that from another post. GM may have added a safety that shuts the car down if the speed sensors are not working when the column is locked, just a guess. if your ABS light is on there should be codes foor that.
PCM - P0300 C H - Most likely cause of the cam
TCS - C1226 H, C1233 H C, C1283 H, C1287 H, U1000 H, U1016 H
BCM - B0507 H, B2587 H, B2592 H, B2723 H, U1016 H
SDM - U1016,40,96 all H
IPC - NO CODES
RADIO - NO CODES
HVAC - NO CODES
LDCM - B2282 H, B2284 H, U1064 H, U1096 H
RDCM - B2283 H, B2285 H, B2263 H, B2265 H, U1064 H, U1096 H.
SCM - NO COMM
RFA - U1000 H, U1016 H
Melting Slicks
Joined: Sep 2008
Posts: 3,129
Likes: 799
From: Espanola New Mexico
Sounds very much like a problem with the can buss, all of the modules on a c5 corvette communicate with each other on a single wire. If one of those modules has a problem with either the 12v power or ground it will cause all modules to stop communicating with each other, especially the BCM to PCM. Try shaking the rubber accordion tube between both car doors and the car, this is an area where some connectors develop loose electrical contacts. There is a procedure where you remove some metal jumpers on two connectors next to the BCM, this is where all the modules are connected together. Maybe c5 diag will post the procedure.
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Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
Sounds very much like a problem with the can buss, all of the modules on a c5 corvette communicate with each other on a single wire. If one of those modules has a problem with either the 12v power or ground it will cause all modules to stop communicating with each other, especially the BCM to PCM. Try shaking the rubber accordion tube between both car doors and the car, this is an area where some connectors develop loose electrical contacts. There is a procedure where you remove some metal jumpers on two connectors next to the BCM, this is where all the modules are connected together. Maybe c5 diag will post the procedure.
Melting Slicks
Joined: Sep 2008
Posts: 3,129
Likes: 799
From: Espanola New Mexico
You might want to disconnect the negative battery cable and disconnect the BCM and pull its cover off to check for corrosion, your car has most likely had some water intrusion. Good luck.
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
I already did that and posted photos of it in the thread. The board looked fine to me. Including all the solder points.
Melting Slicks
Joined: Sep 2008
Posts: 3,129
Likes: 799
From: Espanola New Mexico
Yes you did, I like to help form members and sometimes I am responding to several threads and tend to forget certain posts. I hope the corrosion on the star connectors is the cause of your car's start and stall.
Thread Starter
Intermediate
Joined: Dec 2025
Posts: 30
Likes: 1
I understand sir and thank you for your help ill hopefully come back with some good news soon.