Cadillac CTS 2004 — technical service bulletin
Bulletin 01491B · NHTSA communication 10007664 · issued Jan 1, 2004
Technical service bulletin
communication type
Electrical System
component
2004
model years
4
vehicle entries
Official summary
Tech 2 will not communicate with the vehicle. *mj
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.