GMC Sierra 2500 TSBs
The Sierra 2500 has been assigned 2,685 technical service bulletins (TSB). The 2015 model year has been involved in the most bulletins.
TSBs contain recommended steps and procedures for diagnosing or repairing a known problem. They are issued directly by GMC to service technicians. You'll often see TSBs used as evidence in lawsuits when owners feel the automaker should help with repairs.