Ford GT500 2008 — technical service bulletin
Bulletin 19997 · NHTSA communication 10023990 · issued Oct 1, 2007
Technical service bulletin
communication type
Exterior Lighting
component
2008
model years
2
vehicle entries
Official summary
Mustang vehicles equipped with high intensity discharge (hid) headlamps can not be retrofitted nor daytime running lamps (drl) enabled. *nj
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.