GMC or Keystone problem?
This is totally new for us. Have been towing this trailer (Alpine) with the same GMC 3500 for about 8 years. All of a sudden when I go to shut of the truck it keeps running even with the key removed from the ignition and does so until we disconnect the trailer plug and it shuts down. We discovered this while getting everything ready to head south for the winter.
Anyone have this happen or even have ideas what is feeding back to keep the ruck running? Hate to spend the whole winter having to unplug to shut the truck off but may not have the time to run it down.
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39 foot Forest River Vengeance dragged by GMC 3500.
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