GMC Envoy 2002–2007 — technical service bulletin
Bulletin 050842005 · NHTSA communication 10017334 · issued Feb 1, 2007
Technical service bulletin
communication type
Exterior Lighting
component
2002–2007
model years
6
vehicle entries
Official summary
Information on vertical reflection from headlamps when using high beams in dense fog. *tt updated 04-04-07. *kb
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.