My 03 ZO6 recently had the steering column lock up on it twice with the service column message. I was able to unlock it and drive it to the dealer. They performed campaign 04006 ... I got the car back today and the car seems to be fine, but when you take the key out and the column normally locks it still makes the locking sound but doesn't physically lock. When you put the key back in it makes the unlocking sound as well, but it was never locked in the first place. What exactly is the K harness kit and is it supposed to disable the lock altogether? I thought only the automatics didn't have it at all?

 

I have the K-Harness in mine too. Your setup sounds as though they also removed the locking plate assembly. That is why you hear the lock actuate without it actually locking. What I did when I hooked mine up was, once installed and activated I unlocked the steering. And once I heard the lock actuate to the unlock position I disconnected the lock from the K Harness. Once that was done the K-Harness simulates the lock and I don't get any messages or locking and unlocking sounds. I also didn't remove the locking plate so if I every want to put it back to stock all I need to do is remove the K-Harness and plug the lock back into the wiring harness. Hope that helps. If you know where yours is you might want to try just unplugging the locking mechanism from the K-Harness and you should be good to go. Plus you will not hear it doing it's thing anymore. Since your locking plate has been removed it doesn't matter which position the lock is in when you disconnect it.

I really don't think the GM tecks know how the K-Harness is supposed to work. It basically goes in series with the existing locking mechanism. Once installed they leave it in series with the locking mechanism. Which I think is wrong. They have a plug for the existing lock so that it will still operate the lock. So that you activate it to the unlocked position then disconnect it. Once disconnected the internal circuitry replaces or simulates the now disconnected locking mechanism. If they didn't make allowance for activating the lock to the unlock position it would be virtually impossible to install the K-Harness. Got a little long winded there. But I hope it explains the K-Harness operation as I see it. I have had mine installed for about 5 years now with no hiccups whatsoever.

 

Well,,hate to tell you,,but you kinda SCREWED yourself taking it to the dealer and getting the factory fix!!!They have now reprogrammed you computer with the infamous 2MPH fuel cur off!!! Now WHEN,,not if,,,WHEN your K harness fails,,you will be stranded. My 2000 FRC had been in for two tries at the factory fix,,,worked fine,,,FOR A WHILE. Then bam the dreaded pull key wait 10 seconds,,,Service column lock!! Had to have it flat bedded home and installed an aftermarket CLB,,no noise,,and most important,,NO TROUBLE since!! While it is still working,,,,GET A CLB and install it. If you don't,,sooner or later we will see you posting need help,,have messages on the DIC and car won't move more than a couple of feet and stalls!!!

 

NOW!



GET THE CLB ,,,,,,,,NOW!

 

Another vote for just getting the column lock bypass, install it and be done with worrying about it.

 

The clb bypasses the actuator.

 

I may be wrong...but I believe the 2 mph fuel shutoff was programmed into the car when it was built....and unless you have it deleted by a tuner with efi live....the shut off will always be there whether you have a k-harness or a CLB...and I beleive a tuner doesn't really delete just runs the 2 mph up to 200 mph before the fuel shuts off.

 

^ that's what i understood too. it was always there i thought. i would really like to have the mph changed...even though people posted in my thread about the clb, to me it still seems like the message can occur and the fuel shut off will happen...

 

Maybe in some of the newer ones,,but in my 2000,,when I got the print out of the service record,,right there on the second recall fix(attempt) it was right there. Computer REPROGRAM and test.It has been widely talked about on MANY threads about the 2MPH reprogram!! I too believe it is a common practice is the reprogram the limit to 200MPH!! Regardless,,,the CLB eliminates it signal that triggers the error code that kicks it in,,so the speed is irrelevant!!

 

The programming was done in the past before I owned the car already as a previous repair I was told .. I'm asking strictly about the Kharness. I work at a dealership ( not GM ) and 99% of the time aftermarket stuff causes more problems than it fixes ... so I have the bypass I'd just rather not install it. Thanks for the info Stock Man.

 

My thoughts exactly. But the guys here have been using the bypass for a lot or years now, and I haven't heard of any complaints. So I think it is a safe device to use too.