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GMC 1998 Sonoma Owner's Manual page 364

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Part B: Owner Checks and Services
Listed below are owner checks and services which
should be performed at the intervals specified to help
ensure
the
safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your vehicle,
make sure they are the proper ones, as shown in Part D.
At Each Fuel Fill
It
is
important for you or a service station attendant to
per$orm these underhood checks at ench.fi.~el.fill.
Engine Oil Level Check
Check the engine oil level and add the proper
oil if necessary.
See "Engine Oil" in the Index for further details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL@
coolant mixture if necessary. See "Engine Coolant" in
the
Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the windshield
washer tank and add the proper fluid if necessary. See
"Windshield Washer Fluid" in the Index for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated
to
the correct pressures.
See "Tires" in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See "Audio Systems'' in the
Index for further details.
At Least Twice a Year
Restraint System Check
Make sure the safety belt reminder light and all your
belts, buckles, latch plates, retractors and anchorages are
working properly. Look for any other loose or damaged
safety belt system parts. If you see anything that might
keep a safety belt system from doing its job, have it
repaired. Have any torn or frayed safety belts replaced.
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag system
does not need regular maintenance.)
7-42

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