Hummer H2 2003–2005 — technical service bulletin
Bulletin 040604051 · NHTSA communication 10011043 · issued Sep 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2005
model years
3
vehicle entries
Official summary
Maintenance cleaning of fuel injectors. 2005 and prior all general motors passenger cars and trucks included. *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.