Chevrolet Impala 2003 — technical service bulletin
Bulletin 01427A · NHTSA communication 10004173 · issued Nov 18, 2003
Technical service bulletin
communication type
Equipment
component
2003
model years
1
vehicle entries
Official summary
Surveillance mode will not operate after body control module (bcm) replace. *tt
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.