LB7: Service 4 wheel drive message - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Electrical Discuss anything related to OEM & aftermarket electrical devices including: stereos, speakers, video, batteries, starters, the body control module, lighting, etc.

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Old 08-06-2019, 01:57 PM   #1 (permalink)
uncledon
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Join Date: Mar 2007
Location: west Michigan
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Service 4 wheel drive message

My apologies if this is not in the right forum. I've found limited information out there on this particular message that pops up occasionally on my DIC. I found no useful information in the owners manual either.

I did find a couple of web pages that dealt with this issue and I did inspect, remove, clean and reconnect a ground point below the drivers door area on the truck frame. I thought that had solved the issue as it didn't reappear for some months. I suspect it has to do with a feedback signal (voltage) that is falling outside of parameters thus driving the message.

Anyone out there have some ideas or dealt with this same issue. Thx.

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2002 SILVERADO 3500 Duramax CC DRW 4X4
Banks 4" Monster exhaust, Economind tuner, Bighead waste gate, exhaust brake



Last edited by OkDually; 08-06-2019 at 02:24 PM. Reason: prefix
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