GMC 2003 Sierra - Manual (Page 125)

Recommended Transfer Case Settings
Transfer Case Settings
N
Driving
CorcMtions
2HI
AUTO
4WD
4HI 4LO
Nomnal YES
Variable VES
Severo YES
Extreme YES
Vehicle in Tow'' VES
'See “Focreatlonai Vehicle Towing^ In the
Index for lurfhar inforrination.
Vdu tan choose among four driving setungsi
SED
iiHIJ: This Sitting is used for dnvfng in mosl alr&el
ond highway Sftualions. Y olit ironl axle Is noi engaged
In two- wheal drive. This setting also provides the
best fuel ecortdHtiy.
AUTO 4WD; This setting is ideal for use when roacf
conditions are variable. When driving yoor vehicle
in AUTO JWO, the fronl gxle Is engagedf but the
vehicle's power is sent to the rear wheels. When ihe
vehicle senses a loss of traction, Ihe si/stem will
automatically engage four-wheel drive. Driving in ihls
nrode results in slightly lower fuel eoonom/ than
'^1 Use 4Hl when you need extra traction, such
a on snowy Or icy roads or in most off-road situations.
This setting also engages your front axle to help
drive your vehkile. This is the besi se(1iir>g
I d
use when
pEowing snow.
ts:iLil (4LO): This setting gJso engages your (ronl axle
and delivers extra lorqua. You may never need 4LO. II
sends maximum power to all four wheels, You might
choose 4LO 11 you are dnving off-road in deep
sand, deep mud, deep snow and dimhing or descending
sleep hills.
Д CAUTION;
Shifting the transfer case to NEUTRAL can
cause your vehicle
to roll even if Ihe
transmission is in PARK (P), You or someone
else could be seriously injured. Be sure to set
the perking brake before placing the transfer
case in NEUTRAL See "Parking Brahe'^ in the
Index.
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