Chart based on 132 GMC Sierra HD and 362 Porsche Cayman repairs.
Chart based on 110 GMC Sierra HD and 274 Porsche Cayman repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Don't infer GMC Sierra HD or Porsche Cayman problem frequency from what you see on this page. Many lucky owners have had no repairs, and their cars are not shown.
GMC Sierra HD and Porsche Cayman Problems and Repair Histories