Hummer H2 2003–2006 — technical service bulletin
Bulletin 010730030A · NHTSA communication 627729 · issued Oct 1, 2005
Technical service bulletin
communication type
Power Train
component
2003–2006
model years
7
vehicle entries
Official summary
Diagnostic information on harsh 1-2 upshift. 2001-2002 passenger vehicles and light duty trucks. *yh to include 2003-2006 passenger vehicles and light duty trucks. *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.