Chevrolet 2003 S10 Pickup Owner's Manual page 149

Defogging and Defrosting
9
(Defrost): This mode directs most of the air to the
windshield and the side window outlets, with only a
little air directed to the floor outlets.
+3
(Blend): This mode can be used on cool, humid
days to keep the windshield and side windows clear.
To circulate outside
air
and to help clear the windshield
quickly, do the following:
1. Select the blend mode.
2. Select the temperature.
3. Select the highest fan speed.
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