Ignition Positions (Key Access) - GMC Chevrolet Silverado 2500HD 2021 Owner's Manual

224 Driving and Operating
Caution (Continued)
Avoid making hard stops for the first
322 km (200 mi) or so. During this
time the new brake linings are not yet
broken in. Hard stops with new linings
can mean premature wear and earlier
replacement. Follow this breaking-in
guideline every time you get new
brake linings.
Do not tow a trailer during break-in.
See Trailer Towing 0 272 for the trailer
towing capabilities of the vehicle and
more information.
Following break-in, engine speed and load
can be gradually increased.

Ignition Positions (Key Access)

0. Stopping the Engine/LOCK/OFF
1. ACC/ACCESSORY
2. ON/RUN
3. START
The ignition switch has four positions.
To shift out of P (Park), the ignition must be
ON/RUN and the brake pedal must be
applied.
0 (Stopping the Engine/LOCK/OFF) : This
position turns off the vehicle. It also locks
the ignition, the transmission, and the
steering column, if equipped with a locking
steering column.
To turn off the vehicle:
1. Make sure that the vehicle is stopped.
2. Shift to P (Park).
3. Continue to hold the brake pedal, then
set the parking brake. See Electric
Parking Brake 0 240.
4. Push the key all the way in toward the
steering column, then turn the key to
LOCK/OFF.
5. Remove the key.