The Avalanche has been assigned 1,936 TSBs over 12 model years.
TSBs contain recommended steps and procedures for diagnosing or repairing a known problem. They are issued directly by Chevrolet to service technicians. You'll often see TSBs used as evidence in lawsuits when owners feel the automaker should help with repairs.
A TSB can cover multiple models and years. The 2011 Avalanche has been involved in the most campaigns with 1031 total service bulletins.