GMC 2009 Sierra 1500 Crew Cab Owner's Manual page 552

Service and Miles (Kilometers)
Four-wheel drive only: Change
transfer case fluid (severe service).
See footnotes (g) and (m).
Four-wheel drive only: Change
transfer case fluid (normal service).
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
five years, whichever occurs first).
An Emission Control Service.
See footnote (i).
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (q).
6-8
Additional Required Services (cont'd)
25,000
(40 000) (80 000)
50,000 75,000
(120 000) (160 000)
•
•
100,000 125,000
(200 000)
•
•
•
•
150,000
(240 000)
•
•
•
•