GMC 1996 Sierra Owner's Manual page 343

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Short Trip/City Maintenance Schedule
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Gasoline Engines
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Manual transmission fluid doesn't require change.
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DATE
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ACTUALMILEAGE SERVICED B Y
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51,000 Miles (85 000 km)
0
Change engine oil and filter (or every
3 months, whichever occurs first).
An Elnissiorz Cmtrol Serr?ice.
0
Lubricate chassis components; see footnote
#
(or every
3
months, whichever occurs first).
0
Check readfront axle fluid level and add
fluid as needed. Check constant velocity
joints and axle seals for leaking.
**
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I
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SERVICED BY:
7-17