Chevrolet 2004 Silverado 1500 Pickup Owner's Manual page 531

Additional Required Services (cont'd)
25,000 50,000 75,000 100,000 125,000 150,000
Service (41 500) (83 000) (125 000) (166 000) (207 500) (240 000)
Except Allison: Change automatic
transmission fluid and filter (severe
service). See footnote (h).
Except Allison: Change automatic
transmission fluid and filter (normal
service).
Four-wheel drive with automatic
transfer case only: Change transfer
case fluid. See footnote (g).
Inspect evaporative control system. An
Emission Control Service. See
footnotes † and (k).
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.
5-speed manual transmission only:
Change manual transmission fluid.
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