first problem
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Pro
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first problem
i'm on my second c6 i had the coupe from oct to april with no problems got the vert in april. have just about 4000 miles on it. i've had no problems with either car. then friday on my way home from work chimes started going off and i got a message to service the active handling. i drove straight to my dealerships service . i turned off the car told him about the problem he got in no problems. drove home saturday got up went out the warnings went on again. turned the car off restarted it. nowarnings. a little while later the whole thing started up again and this time the security system light stayed on. so i gave up and made an appointment for tuesday morning at the chevy dealership 
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Joined: Aug 2005
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From: Birmingham MI
Originally Posted by BACH
i'm on my second c6 i had the coupe from oct to april with no problems got the vert in april. have just about 4000 miles on it. i've had no problems with either car. then friday on my way home from work chimes started going off and i got a message to service the active handling. i drove straight to my dealerships service . i turned off the car told him about the problem he got in no problems. drove home saturday got up went out the warnings went on again. turned the car off restarted it. nowarnings. a little while later the whole thing started up again and this time the security system light stayed on. so i gave up and made an appointment for tuesday morning at the chevy dealership
Race Director
Joined: Jun 2000
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From: Hurst, TX USA
On the C5s that almost always was caused by a bad speed sensor in a wheel or some other sensor. Usually a quick easy fix. No reason to think C6s would be much different. Hope that's all it is
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From: Austin TX
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St. Jude Donor '03-'04-'05
I had intermittent electrical problems similar to that, but not that exact one. They went from intermittent to more frequent to constant, and it sounds like you are still in the intermittent stage. In trying to fix my C6, they've gone through a couple of different ECMs and wiring harnesses, and replaced the throttle position sensor. She's going back into the shop tomorrow for yet another main wiring harness replacment. 40+ days in the shop for electrical issues.
I hope yours is an easy fix, but don't count on it.
I hope yours is an easy fix, but don't count on it.
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first problem
well i took the vert in at 8:30 this morning.i left it there and called them back at 11:30. the tech said there were about 17 codes that he cleared.'and most only happen when the battery goes dead. i said that's pretty strange because i've never had a battery problem. but any way he cleared them and i've been driving the car all day with no problems so we'll just have to call it some a mystery that we'll probablk never solve but all it took was a few hours and didn't cost anything so it has a happy ending 
Melting Slicks
Joined: Oct 2005
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had the same problem. Its the ABS control module. The steering sensor malfunction is just a symptom of the underlying problem from what I understand. Had the ABS control module replaced in my car and no more problems. Good luck. 
Drifting
Joined: Sep 2004
Posts: 1,551
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From: Livingston Texas
Did you just get the Service Active Handling message in the DIC or was the TC light or ABS light on also? I am currently having the same issues but no DTC's when I scanned it. Mine shows the Service Active Handling message and the TC light is on. Which looking through the manual seems to be DTC C0136, C0137 or possibly C0242.
The car sat for awhile and I was in and out without starting it so maybe mine is just a low battery. Hmmmmm, maybe I need to go put it on charge.
The car sat for awhile and I was in and out without starting it so maybe mine is just a low battery. Hmmmmm, maybe I need to go put it on charge.
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From: Austin TX
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St. Jude Donor '03-'04-'05
Originally Posted by BACH
well i took the vert in at 8:30 this morning.i left it there and called them back at 11:30. the tech said there were about 17 codes that he cleared.'and most only happen when the battery goes dead. i said that's pretty strange because i've never had a battery problem. but any way he cleared them and i've been driving the car all day with no problems so we'll just have to call it some a mystery that we'll probablk never solve but all it took was a few hours and didn't cost anything so it has a happy ending
Now what your tech said is true. When your battery is nearly dead and you try to crank it up, the voltage isn't high enough for all the computers to come on, and there will be a bunch of codes saying that this computer system can't talk to that one, or this one failed, etc. When my C5's battery was going bad (very typical sudden death syndrome of AGM batteries, which is a completely different problem from the '05 MN6 DBS), it threw a bunch of codes. CHanged the battery, it cranked right up, and everything was fine.
Drifting
Joined: Sep 2004
Posts: 1,551
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From: Livingston Texas
Originally Posted by GTC
I had intermittent electrical problems similar to that, but not that exact one. They went from intermittent to more frequent to constant, and it sounds like you are still in the intermittent stage. In trying to fix my C6, they've gone through a couple of different ECMs and wiring harnesses, and replaced the throttle position sensor. She's going back into the shop tomorrow for yet another main wiring harness replacment. 40+ days in the shop for electrical issues.
I hope yours is an easy fix, but don't count on it.
I hope yours is an easy fix, but don't count on it.
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From: Austin TX
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St. Jude Donor '03-'04-'05
Originally Posted by Brett Hunter
Did they replace the ECM or the BCM? The BCM controls most of the functions that you described having troubles with not the ECM. The BCM is located in the passenger seating area near the fuses.
Drifting
Joined: Sep 2004
Posts: 1,551
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From: Livingston Texas
Originally Posted by GTC
The service sheets said it was the ECM (FP-Number 12597883).
The BCM is the gateway between class 2 and GMLAN data and as the power mode master it controls electrical power management.
Below are just a few of the other things the BCM controls:
ext lighting
int. lighting
auto door locks
keyless entry
theft deterrent
wipers/washers
headlamp washer
cruise control
entertainment
column lock
power roof
Burning Brakes
Joined: Feb 2005
Posts: 867
Likes: 148
From: N CA
Originally Posted by GTC
I had intermittent electrical problems similar to that, but not that exact one. They went from intermittent to more frequent to constant, and it sounds like you are still in the intermittent stage. In trying to fix my C6, they've gone through a couple of different ECMs and wiring harnesses, and replaced the throttle position sensor. She's going back into the shop tomorrow for yet another main wiring harness replacment. 40+ days in the shop for electrical issues.
I hope yours is an easy fix, but don't count on it.
I hope yours is an easy fix, but don't count on it.
