Hummer H2 2003–2008 — technical service bulletin
Bulletin 04-06-01-029 · NHTSA communication 10012707 · issued Feb 1, 2008
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003–2008
model years
9
vehicle entries
Official summary
Unnecessary engine crankcase and subsystems flushing services, additive recommendations and proper utilization of gm simplified maintenance schedule to enhance customer service experience. 2008 and prior gm cars and trucks. *tt updated 3/31/08. *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.