Chevrolet Express 2003–2006 — technical service bulletin
Bulletin 3815 · NHTSA communication 10018925 · issued Jan 25, 2006
Technical service bulletin
communication type
Electrical System
component
2003–2006
model years
8
vehicle entries
Official summary
Installing trailer wiring harness without the z82 option. *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.