2008 GMC Acadia

Ronald Owner/Technician North Carolina Posted   Latest   Edited  
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Driveability
2008 GMC Acadia SLE 3.6L (7) 6-spd (6T75) — 1GKEV33748J276886
Battery Dies
No Horn

The Snap on Verus Pro scan tool I can beep horn, and switch high and low beam, turn signal light on with no flashing.I also see radio stays lit after key is out for 15 mins. I measure 61.4 ohms from high speed positive to negative bus lines and the data link connector. I also have a Tech2 scan tool I notice when I look at horn data I see lift gate data. Same on door module I only see lift gate data. I also can't communicate with cluster or lift gate. Cluster shows rpm, and dash lights as normal. Lift gate works. I can see where some one has been tampering with the BCM. I have a full charge with new battery at 12.7 Where do I go next?

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Samuel Owner/Technician
Michigan
Samuel
 

Maybe way off base but ran into this issue twice on 2008 acadias. Check the internal fuse box. I actually replaced one of these last week. The customer had the vehicle to me multiple times complaining that the battery was dying and weird things were having an electrically. every time I looked at it I never had an issue until the last time he brought it to me, the car would not turn off at this…

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Brad Diagnostician
Washington
Brad
   

It was kind of a hard read to figure out exactly what is going on here. But anytime that you have major electrical issues on a R/V platform it is a very good idea to drop the glovebox and look at the IP fuse panel in there. You want to look at the top of the panel and see if it has water in it and in the connectors. They will have all sorts of odd gremlins when this happens. Loss of…

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Ronald Owner/Technician
North Carolina
Ronald
 

I was starting there. I read about water intrusion. How does the fuse box come out? Will the glove box come off?

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Brad Diagnostician
Washington
Brad
 

First remove the glove box. When looking in there you will see the connectors that go into the top of it. Reach in there and remove a connector and inspect the terminals for water and green corrosion. To remove you will remove the passenger IP insulator and the passenger side door carpet retainer. That baby is wedged in there tight. If it does in fact have water intrusion you will also need to…

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Ronald Owner/Technician
North Carolina
Ronald Delay
 

I got a BCM in and programmed. The IPC is still not communicating. I’m waiting on a IPC. The IPC lights up.

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