Cadillac XTS 2013–2018 — technical service bulletin
Bulletin 17NA321 · NHTSA communication 10169305 · issued Nov 13, 2019
Technical service bulletin
communication type
Engine
component
2013–2018
model years
11
vehicle entries
Official summary
This technical bulletin provides a procedure to replace the catalytic converters due to cracks that may cause a noise or exhaust smell within the cabin.
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.