Chevrolet 1993 S-10 Pickup Owner's Manual page 82

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Featums & Contmls
2. 4HI: This setting engages your front axle to help drive your vehicle.
Use 4HI when you need extra traction, such as on snowy or icy roads,
or in most off-road situations.
3. 4LO: This setting also engages your front axle to give you extra traction.
You may never need 4LO. It sends the maximum power to all four
wheels. You might choose 4L0 if you were driving off-road in sand,
mud, or deep snow and climbing or descending steep hills.
Indicator lights on the switch show you which setting you are in. Both
indicator lights will come on briefly when you turn on the ignition. If both
lights do not come on, you should take your vehicle in for service. The 4HI
position has a green indicator light and the 4LO position has an amber
indicator light. When shifting from 4HI to 4LO or 4LO to 4HI, the indicator
light will flash until the shift is completed.
Two-Wheel Drive, "TWO WHEEL", does not have a switch position or an
indicator light. Your vehicle will be in two wheel drive i f neither indicator light
is on.
To shift from two-wheel drive, "TWO WHEEL", to 4HI: Press and release
the 4HI switch. This can be done at any speed, and the front axle will lock
automatically.
To shift from 4HI to two-wheel drive, "TWO WHEEL": Press and release
the 4HI switch. This can be done at any speed, and the front axle will unlock
automatically.
To shift from two-wheel drive, ''TWO WHEEL", or 4HI to 4LO: Stop your
vehicle. Shift your transmission into N (Neutral) or depress your clutch pedal.
Press and release the 4LO switch. You must wait for the amber 4LO
indicator light to stop flashing and go solid amber before shifting your
transmission into gear or releasing the clutch pedal.
If the 4L0 switch is pressed when your vehicle is in gear and/or moving, the
amber 4L0 indicator light will flash for 30 seconds and not complete the shift
unless your vehicle is below 3 mph and the transmission is in N (Neutral) or
the clutch pedal depressed.
On automatic transmission equipped vehicles: If your transfer case does not
shift into 4L0, your transmission indicator switch may require adjustment. With
your transmission in N (Neutral), press and release the 4LO switch. While the
amber 4LO indicator light is flashing, shift your transmission into P (Park).
Wait until the 4LO indicator light goes solid amber before shifting your
transmission into gear. This will get you into 4L0, but you should take your
vehicle in for service so normal operation can be restored.
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