Hummer 2004 H2 Owner's Manual page 433

Additional Required Services (cont'd)
25,000 50,000 75,000 100,000 125,000 150,000
Service and Miles (Kilometers) (41 500) (83 000) (125 000) (166 000) (207 500) (240 000)
Change automatic transmission fluid
and filter (normal service).
Change transfer case fluid. See
footnote (g).
Replace engine air cleaner filter. See
Engine Air Cleaner/Filter on page 5-19.
An Emission Control Service.
Replace spark plugs and inspect spark
plug wires. An Emission Control
Service.
Engine cooling system service (or
every 5 years, whichever occurs first).
An Emission Control Service. See
footnote (i).
Inspect engine accessory drive belt. An
Emission Control Service.
6-7