Cadillac CTS 2003–2004 — technical service bulletin
Bulletin 040730012 · NHTSA communication 10008678 · issued Mar 1, 2004
Technical service bulletin
communication type
Power Train
component
2003–2004
model years
4
vehicle entries
Official summary
Transmission fluid checking procedure for 5l40-e and 5l50-e automatic transmissions. *tt
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.