GMC 2004 Canyon - Manual (Page 107)

4
n
(4LO): This setting also engages your front axle to
give you extra traction. It sends the maximum power
to all four wheels. You might choose 4LO if you
were driving off-road in sand, mud or deep snow and
climbing or descending steep hills.
Indicator lights in the buttons show you which setting
you are in. The indicator lights will come on briefly when
you turn on the ignition and one will stay on. If the
lights do not come on, you should take your vehicle in
for service. An indicator light will flash while shifting.
It will remain illuminated when the shift is completed.
If for some reason the transfer case cannot make
a requested shift, it will return to the last chosen setting.
Shifting from 2HI to 4HI
Press and release the 4HI button. This can be done at
any speed, and the front axle will lock automatically.
Shifting from 4HI to 2HI
Press and release the 2HI button. This can be done at
any speed, and the front axle will unlock automatically.
Shifting from 2HI or 4HI to 4LO
To shift from 2HI or 4HI to 4LO, the vehicle must be
stopped or moving less than 1.2 mph (2 km/h) with the
transmission in NEUTRAL (N) in vehicles equipped
with an automatic transmission or the clutch pedal
engaged in vehicles equipped with a manual
transmission. The preferred method for shifting into
4LO is to have your vehicle moving 1.2 mph (2 km/h).
Press and release the 4LO button. You must wait for
the 4LO indicator light to stop flashing and remain
illuminated before shifting your transmission into gear or
releasing the clutch pedal.
If the 4LO button is pressed when your vehicle is in
gear and/or moving, the 4LO indicator light will flash for
30 seconds and not complete the shift.
On automatic transmission equipped vehicles, if your
transfer case does not shift into 4LO, your transmission
indicator switch may require adjustment. With your
transmission in NEUTRAL (N), press and release the
4LO button. While the 4LO indicator light is flashing, shift
your transmission into PARK (P). Press 4LO again.
Wait until the 4LO indicator light remains illuminated
before shifting your transmission into gear. Press
the 4LO button again to complete the shift. This will get
you into 4LO, but you should take your vehicle in for
service to restore normal operation.
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