Originally Posted by Msarver
I am a first time vette owner and I need some help.
I have a 2000 C5 automatic wth 55,000 miles that I have only owned for a couple of months. It has been sitting during the cold weather and the battery went low.I tried to start it and I got the service column lock warning. The steering isnt locked and the car runs fine after I charged the battery. I still get the warning when I turn the key on , but the car seems fine. I have read some posts that say the steering locks and the fuel shuts off if you try to drive it, but I'm not experiencing those issues. I'm not sure if there was a recall on my car but the carfax doesnt show any recalls.
Since the steering isn't locked, should that mean something has previously been fixed and if so how do I clear the alarm?
Thanks for any advice
Since your steering doesn't lock the GM Column Lock Recall service was done to it. For an automatic that would have installed a small diameter lock ring that physically prevents the column from locking and there should have been a reflash of the PCM to set the fuel shutoff to 2mph. There also would have been a GM K Harness installed between the lock motor and the BCM. Chances are that when the battery went low the relay portion of the GM K Harness fried. The GM K Harness having failed is what is causing the error message(s) you are seeing. The internals of a fried relay will look like this:
Since you are NOT the original owner of the car, a prior owner likely had the fuel shutoff reprogrammed to a higher number like 200mph. Or, if the car has had a tune applied to the PCM then most tuners reset that speed when they do the tune.
Since the only problem you are experiencing is the message(s) you have several options:
1) Do nothing and just reset the error message each time you start the car. Cost = none.
2) Remove the GM K Harness and plug the lock motor male connector into the female connector that is attached to the bottom of the dash that goes over to the BCM. This restores the column lock wiring to factory. The K harness is NOT needed. Cost = none
3) Remove the GM K Harness and install an after market CLB. cost = $50 plus shipping.
4) Purchase and install a new GM K Harness (which will fail again the next time the battery goes low). Cost = around $120.
Lots of additional Column Lock info found on the last 15 or so pages of this link: