Front Axle Locking Feature - Chevrolet 2003 Silverado Owner's Manual

Shift Light
you can shift to the next higher gear if weather, road
and traffic conditions allow. For the best fuel
economy, accelerate slowly and shift when the light
comes on.
While you accelerate, it is normal for the light to go
on and off if you quickly change the position of
the accelerator.
If your vehicle has four-wheel drive and is equipped
with a manual transmission, disregard the SHIFT
light when the transfer case is in 4-Wheel Low.
Ignore the SHIFT light when you downshift.
If you have a manual
transmission, you may
have a shift light. This light
will show you when to
shift to the next higher gear
for best fuel economy.
When this light comes on,
Four-Wheel Drive
If your vehicle has four-wheel drive, you can send your
engine's driving power to all four wheels for extra
traction. To get the most satisfaction out of four-wheel
drive, you must be familiar with its operation. Read
the part that follows before using four-wheel drive. See
the appropriate text for the transfer case in your
vehicle.
Notice: Driving in the 4-WHEEL HIGH (4HI) or
4-WHEEL LOW (4LO) positions for a long time on
dry or wet pavement could shorten the life of
your vehicle's drivetrain.

Front Axle Locking Feature

The front axle locks and unlocks automatically when
you shift the transfer case. Some delay for the axle to
lock or unlock is normal.
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