GMC 2000 Sierra - Manual (Page 108)

yellow blue
2-30
You can shift from 2 - Wheel High (2H) to 4 - Wheel High
(4H) or from 4 - Wheel High (4H) to 2 - Wheel High (2H)
while the vehicle is moving. Your front axle will engage
faster if you take your foot off of the accelerator for a
couple of seconds after you shift. In extremely cold
weather, it may be necessary to stop or slow the vehicle
to shift into 4
- Wheel High (4H).
To shift into or out of 4 - Wheel Low (4L) or
NEUTRAL (N):
1. Slow the vehicle to a roll, about 1 to 3 mph
(2 to 5 km/h) and shift an automatic transmission
into NEUTRAL (N), or with a manual transmission,
press the clutch pedal.
2. Shift the transfer case shift lever in one
continuous motion.
Don’t pause in NEUTRAL (N) as you shift the transfer
case into 4
- Wheel Low (4L), or your gears could clash.
Remember that driving in 4 - Wheel High (4H) or
4 - Wheel Low (4L) may reduce fuel economy. Also,
driving in four - wheel drive on dry pavement could
cause your tires to wear faster and make your transfer
case harder to shift and run noisier.
Automatic Transfer Case (If Equipped)
The transfer case switches
are located to the left of the
instrument panel cluster.
Use these switches to shift into and out of
four
- wheel drive.