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So here's a disturbing new problem with my 2009 SLE. Stop, put the transmission in Park, and turn of the engine, but the engine keeps running. The dash lights go out and the gauges aren't moving, but the engine is still going. You can push the accelerator and hear it rev up. I turned the key back to Run and got a bunch of messages on the DIC, one being 'Engine Power Reduced' or something like that. At that point the SES light came on as well.

I turned the key off a couple more times to see if it was something loose in the ignition but it had no effect. After maybe 5 minutes the engine did stop, and worked fine after that. This was about three weeks ago, but then it happened again today.

I've searched on this and found that some people with leaky sunroofs had this, but I don't have a sunroof. From what I can see, I don't have any water intrusion anywhere in the vehicle. And in both cases, it had not rained recently and I had not washed it in several days. Any ideas? Probably needs to go to the dealer. :banghead:
 

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As you well know, looking for water leaks is the first task when electrical problems pop up with these vehicles. But without a sunroof, I don't know where to tell you to start. Hope it's something simple.
 

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More than likely a bad ignition switch. GM is still being plagued with switch issues although not quite as bad as previous years.
 

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Hi bluevolume,

I am sorry to hear about this new issue with your vehicle! If you would like me to schedule an appointment at your dealership, I would be happy to do so.

Jessica
GMC Customer Care

bluevolume said:
So here's a disturbing new problem with my 2009 SLE. Stop, put the transmission in Park, and turn of the engine, but the engine keeps running. The dash lights go out and the gauges aren't moving, but the engine is still going. You can push the accelerator and hear it rev up. I turned the key back to Run and got a bunch of messages on the DIC, one being 'Engine Power Reduced' or something like that. At that point the SES light came on as well.

I turned the key off a couple more times to see if it was something loose in the ignition but it had no effect. After maybe 5 minutes the engine did stop, and worked fine after that. This was about three weeks ago, but then it happened again today.

I've searched on this and found that some people with leaky sunroofs had this, but I don't have a sunroof. From what I can see, I don't have any water intrusion anywhere in the vehicle. And in both cases, it had not rained recently and I had not washed it in several days. Any ideas? Probably needs to go to the dealer. :banghead:
 

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I have a 2007 Acadia and also experiencing this problem. This is very disturbing especially after reading all the posts related to the same problem and GM has not made any improvements to the design or notified their repair shops of this problem. My car is at the repair shop now and I'm looking at an $800 bill right before Christmas. I tried to email GM Customer Care and have not gotten a response, I tried calling and the voice prompt keeps shutting off and I can not get a representative on the phone. This is very frustrating and now I'm really considering not purchasing another vehicle made by GM ever again. And this is said since my father retired from GM and I also use to work for GM. If anyone found a way to get GM or their dealership to help with this problem, please let me know. Thanks
 

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There is a TSB specifically speaking to this issue in regards to wiring on the passenger floor area. (I know as I just went throw almost every inch of wiring in my car this weekend) This applies with OR without sunroof.

Bulletin No.: 08-08-57-003C
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TECHNICAL Bulletin No.: 08-08-57-003C Date: July 15, 2011

Subject: Floor Wet Under Carpet/Engine Continues to Run with Key Off/Possible No Crank/No Start/Communication Loss/Various Electrical Concerns (Seal Seam)
Models:
2008-2012 Buick Enclave
2007-2012 GMC Acadia
2007-2010 Saturn OUTLOOK
Supercede:
This bulletin is being revised to add model years and update the Correction information. Please discard Corporate Bulletin Number 08-08-57-003B (Section 08 - Body and Accessories).

Condition: Some customers may comment on any, or a combination of, the following conditions:
  • Evidence of a water leak at the right side A-pillar and/or the right front floor is wet under the carpet.
  • Various electrical concerns such as: Engine Continues to Run with Key Off/Possible No Crank/No Start/Communication Loss/Various Electrical Concerns, which may be a result of a water leak on the IP BEC.
  • Other electrical related conditions that may be communication issues between certain electrical modules due to water dripping on the IP BEC.
Cause
Water from the right front sunroof drain hose exits the vehicle through the plenum (upper arrow) and may re-enter through the un-sealed seam at the front of the dash. Refer to lower arrow in the illustration.

In more current models years, sunroof drain hose and windshield related issues have sometimes been found to be a source of a water leak in the A-pillar area. This water can also sometimes leak on the IP BEC and/or onto the floor area.

Correction
For Model Years 2007-2008
Important
Inspect the front drain hoses to ensure that they are free of clogs or kinks, and that water is properly flowing through the hoses.

1. Remove the windshield wipers and cowl screen where sealing repair is to be done.
Important
Inspect the IP BEC for wetness and/or any green colored corrosion.
Important
During water testing, do not point the nozzle/hose upward on the cowl area as this is likely to force water entry where a leak may not even be existent.

2. In order to verify the waterleak, run a small amount of water into the square hole inside the cowl while looking at the IP BEC.
3. Allow the water to dry and proceed to step 4.
4. Seal the seam INSIDE the opening at the bottom and to the right and left of the arrows in the illustration. Seal the full length of the dotted line. Seal the seam with P/N 12378500 (in Canada, use 10952233) Medium Body Seam Sealing Compound or equivalent.

For Model Years 2009-2012
  • Inspect the right side A-pillar/windshield area and water test for any leaks.
  • Inspect the front drain hoses to ensure that they are free of clogs or kinks, and that water is properly flowing through the hoses.
  • Inspect the IP BEC for wetness and/or any green colored corrosion.
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I have a 2017 Acadia with this same problem. I assure you there are no inside water leaks. Very frustrating. Honestly, two year old car with a major issue like this....can't wait to get rid of it (and I've never gotten rid of a car before it was at least 10 years old). If they've continually had problems with this, why isn't it on recall?
 

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Probably it would be due to the leakage of water on your electrical system so check it other wise you have to go to dealer or any reputed car care center.
Hi bluevolume,

I am sorry to hear about this new issue with your vehicle! If you would like me to schedule an appointment at your dealership, I would be happy to do so.

Jessica
GMC Customer Care
Why has this not been a recall issue please someone help call me 6623472110
 
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