length GMC SIERRA 2020 Get To Know Guide

20F Optional equipment
HILL DESCENT CONTROLF
PARK GRADE HOLD ASSIST
Hill Descent Control sets and maintains vehicle speed from 1–14 mph while descending a steep incline in a forward or reverse gear.
1. Press the Hill Descent Control button on the center of the instrument panel. Vehicle speed must be below 31 mph to enable the system. The Hill Descent Control symbol will illuminate on the instrument cluster.
2. Increase or decrease speed by applying the accelerator or brake pedal or use the Cruise Control +/– buttons on the steering wheel. The adjusted speed becomes the new set speed. The symbol flashes when the system is actively applying the brakes to maintain vehicle speed.
See Driving and Operating in your Owner’s Manual.
Park Grade Hold Assist enhances hill hold by using braking effort at all four wheels to help keep the truck in place for an extended length of time.
See Driving and Operating in your Owner’s Manual.
Use the four-wheel drive buttons on the left side of the instrument panel to shift into and out of four-wheel drive. The Driver Information Center displays the current status of the transfer case.
AUTO Auto Four-Wheel Drive High – Use when traction conditions vary. Shift into this mode at any speed except when shifting from
4
4
2
.
44
2
Two-Wheel Drive High – Use for most streets and highways. Shift into this mode at any speed except when shifting from
44
2
.
4
4
2
Four-Wheel Drive High – Use when extra traction is needed or in most off-road driving. Shift into this mode at any speed except when shifting from
44
2
.
44
2
Four-Wheel Drive LowF – Use when driving off-road in deep sand, mud or snow, or on steep hills. Shift into or out of this mode when the vehicle is stopped or moving less than 3 mph with the transmission in Neutral. Shift the transmission into gear when the indicator light stops flashing.
N NeutralF – Use to dolly or dinghy tow the vehicle behind an RV. Neutral is not avail-able with the single speed transfer case. Refer to your Owner’s Manual for the shift procedure.
See Driving and Operating in your Owner’s Manual.
FOUR-WHEEL DRIVEF