Two-Speed Rear Axle Electric Shift Control - GMC TopKick 2007 Owner's Manual

Two-Speed Rear Axle Electric
Shift Control
If your vehicle has this feature, you will find a label
on the headliner above the windshield or in
another place near the driver that shows how to
use it. Be sure to follow the directions carefully.
Use the following directions based on the type of
shift control the vehicle has.
When the switch is down, the rear axle is in the
high range. When the switch is up the rear axle is
in low range. Push or pull the switch to change
the range.
The rear axle shift
control switch for a
manual transmission is
located on the shift lever.
The two-speed axle control should be in the up
position or low range when you park the vehicle.
You will need to engage the transmission and
move the vehicle a little to assure the axle is in the
low range. Then apply the parking brake, shift
into NEUTRAL and shut off the engine.
Also, always start the vehicle in motion with the
two-speed axle in the low range.
To shift up from low to high, do the following:
1. Move the switch down for the high range.
2. Disengage the clutch.
3. After a brief pause, engage the clutch and
then press down on the accelerator pedal
until the axle engages.
To shift down from high to low, do the following:
1. Release the accelerator and move the
switch upward for low range.
2. Press the accelerator pedal slowly until the
axle engages.
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