mrlmd

I can't find those other threads on the same topic without searching all day, so it's easier to add another one. Sorry.


I installed my LMC5 about 10 days ago, no trouble, as I said before, it took longer to read the 4 page directions than to actually do it. This was done prophylacticaly as I had no trouble before and there must have been some mod (maybe the GM recall) made to my car previously because my steering wheel would not lock. Anyway, it functioned fine for about a week, then I started getting the message to "pull key, wait 10 sec." when I went to start it. I did the recommended easy fix, to remove fuse #23 and to disconnect the battery and let the computer reset, and this worked for a day or two. Then backing out of a space yesterday, the car shut off with the "service column lock" message. I pulled the key, was able to restart it, move about another 10 feet, then the message reappeared and the car shut off again. Needless to say i was f**king pissed. The third time, luckily for me, the message did not reappear and I could drive the 5 miles to get home. Talking to Richard at Compliance Parts, he told me that maybe 1 out of every 200 C5's have this problem with the BCM and to do the brown wire fix as outlined in the directions on the bottom of page 2. I did that this morning and have started the car a half dozen times and get no messages, so right now everything seems to be working OK. Time will tell if this is a satisfactory remedy. I really dislike having to fix a fix for something that wasn't broken to begin with, but, this was done prophylacticaly to prevent the dreaded fuel shutoff, and after having experienced that, I'm still glad I did this. When that message and the fuel shutoff happens, you are just dead, sitting there wherever the car is, and that's not really an appealing situation. I hope my little extra brown wire hookup solves the little glitch I had, but I think everyone with one of these cars should install that LMC5 module to prevent getting stuck, and it's usually where you don't want to be.

pewter99

pewter99

AFAIK no. I have no idea what they did the first two times it was flat bedded to the dealer in the early days. Whatever they did din't work because it wasn't a month between trip 1 and 2. When it came back after the 2nd trip I immediately installed the CLB and never looked back. I do know that a couple years later my SA told me there was an open TSB or recall on my vehicle to fix the column lock. I told them to close it as I fixed it and did not want the recall performed. He said okie dokie

mrlmd

If you read my post you would know that I did that. I pulled the key, numerous times, but the messages kept coming back, multiple times, not consistently, seemingly randomly. I did all the tricks recommended to reset the BCM until the dreaded fuel shutoff occurred. Richard, the vendor, was contacted and he told me to do the brown wire connection to the BCM. You can be sure I will contact him again if this doesn't work.

seu318

I also did a preemptive LMC5 install - ('99 A/T coupe 167K miles) - as I felt it was relatively cheap insurance. Well - shortly after the install - I actually started getting the pull-key message. Was kind of surprised at first, but I went back and re-read the instructions - and then went back in for the brown wire fix. Been fine ever since - no recurrence of the pull-key message. All is well.

thepitstop2010

Anyone have the "brown wire fix instructions"?

mrlmd

It's on the bottom of page 2 in the instruction manual and also reproduced here in one of the multiple threads on this subject.
Basically you again disconnect the neg battery terminal, remove the upper larger pink connector from the BCM, pull out the lower dark green 3rd wire from the right (diagonally down to the left from the previous one you replaced with the LMC5 wire) and replace this one with the brown wire from the LMC5, then cut the brown short wire loop sticking out of the LMC5, cap all the wire ends with the caps provided, replace the BCM back in it's holder, reconnect the battery, and you are done. Hopefully forever.

Corvette_Ed

Everyone should keep in mind that the "brown wire fix" will not work in all instances. Some of these cars (mine is one of them, yippee...) don't like the regular LMC5 and have to get either the LMC5-R or another version. Mine, as mentioned, is one of the oddballs and I had to go with the LMC5-R to fix mine for good.

Which reminds me....I forgot to mail the original back to Richard. Does anyone happen to have his mailing address or Web address handy? I'm on a different computer and don't have the links on this one. Thanks!

Corvette_Ed

Thank you.

Norm07

2000 Coupe with the typical column lock/fuel shut off issue. Installed the LMC5 but like the OP the pull key wait 10 second message remained. Did the brown wire, cut the loop and now all is good. No more problems.