U2100

Power Door Locks Cycle or Intermittently Inoperative – Loss of Data With Multiple U-Codes –Unwanted Seat or Memory Mirror Movement or Doesn’t Function –Intermittent No Crank/No Start or Reduced Power – 2017-2021 GMC Acadia & Cadillac XT5

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2019 GMC Acadia

NHTSA ID Number: 10185718 Manufacturer Communication Number: PIT5606J   Summary This Preliminary information communicates an Intermittent No Crank, No Start, or Reduced Power loss of data multiple U codes or Intermittent Power Door Locks inoperative, unwanted seat or mirror movement.  Inspect harness for chaffed by the I-shaft at the base of the steering column. If chaffed, repair damaged wires … Read more

Diagnosing High Speed LAN Concerns – 2007-2014 Cadillac Chevrolet GMC Hummer

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2014 Cadillac Escalade

NHTSA ID Number: 10114600 Manufacturer Communication Number: PIT4667D Summary This Preliminary Information communication advises the technician of additional steps for diagnosing General Motors high speed local area network. This should only be used if normal service information doesn’t lead to a diagnosis this is not a replacement for normal service information.   107 Affected Products Vehicles MAKE … Read more

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

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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 … Read more