Aftermarket ALDL or DLC Interface Devices Causing Multiple Issues – GM Passenger Cars and Trucks

General Motors

  NHTSA ID Number: 10222776 Manufacturer Communication Number: 13-08-116-001H Summary The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.   Condition Customers may comment on various issues with their vehicle related to high …

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