GMC 1993 Jimmy Owner's Manual page 276

Service & Appearance Care
. .
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To Check Engine Oil: Pull out the dipstick and clean it with
a
paper .towel
or cloth, then push it back in all the way. Remove it again, keeping the
tip
lower.
When to Add Oil: If the oil is at or below the ADD line, then you'll need to
add some oil. But you must use the right kind. This section explains what
kind of oil to use. For crankcase capacity, see "Capacities and Specifications"
in the Index.
NOTICE
I
Just fill it enough to put the level somewhere in the' proper operating range.
Push the dipstick all the way back in when you're through.
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