GMC 2007 Sierra 1500 Pickup, Owner'S Manual

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When Using the Manual Transfer Case
•
Shifting should be made using quick motions.
Shifting slowly may make it more difficult to
shift.
•
You may notice that it is harder to shift when
the vehicle is cold. After the vehicle warms
up the shifting will return to normal.
•
While in 4H or 4L you may experience
reduced fuel economy.
•
Avoid driving in four-wheel drive on clean, dry
pavement. Doing this may cause the tires to
wear faster, and make your transfer case
harder to shift, and run noisier.
Shifting from 2H (Two-Wheel Drive High)
to 4H (Four-Wheel Drive High)
•
Shifts between 2H and 4H can be made at
any vehicle speed.
•
It is easiest to shift the transfer case when
maintaining a constant speed or during a slight
acceleration. If possible, avoid shifting while
slowing down, as it will make it harder to shift.
•
Shift the transfer case lever in one continuous
motion into either the 4H or 2H position.
•
In extremely cold weather, it may be necessary
to slow or stop the vehicle to shift into 4H until
your vehicle has warmed up.
•
While in 4H, your vehicle can be driven at any
posted legal speed limit.
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