Chevrolet Silverado 1500 2013 — technical service bulletin
Bulletin 13346 · NHTSA communication 10246793 · issued Nov 1, 2013
Technical service bulletin
communication type
Power Train
component
2013
model years
2
vehicle entries
Official summary
Service Update for Inventory and Customer Vehicles 4-Wheel Drive Transfer Case Adapater Housing Expires with Base Warranty - Equipped with 4 WD and 6-Speed Automatic Transmission (MW7)
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.