GMC 2003 Sierra - Manual (Page 122)

While you accelerate. It is normal lor the light to go
on and off it you quickly change the position of
the accelerator.
If your vehicle has four-wheel drive anil is equipped
with a manual tiansmlBSion, disregard Ihe SHIFT
light when the iranster case is in 4-Wheel Low^
Ignore the SHIFT tight when you downshift.
Four-Wheel Drive
II your vehicle has lour’wheel drive, you can send your
engine's driving power to all four wheels for e^itra
traction. To get the most salislaclron out of four-wheel
drive, you must ho familiar with ils operalion* Read
Ihe part that tollows before using iour-wheei drive. See
the appropriate taxi far the Uansfer case in your
vehicle
Notice: Driving in the 4-WHEEL HIGH (4HI) or
4-WHEEL LOW {4LO) positions tor a long lime on
dry or wet pavement could shorten Ihe life of
your vehicle's drivetrain.
The front ante locks and unlocks auTomatically when
you shift Ihe transfer case. Some delay lor the a^le to
took Of unlock is norrnal
Manual Transfer Case
Front Axle Locking Feature
The transfer ca№ shill tever Is on the floor lo the right
ct the driver. Use this lever lo shift into and out of
four-wheel drive
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