Chevrolet 2010 Express Owner's Manual page 138

Automatic Transmission Operation
(Four Speed Automatic
Transmission)
There are several different positions for your shift lever.
P (Park): This position locks your rear wheels. It is
the best position to use when you start the engine
because the vehicle cannot move easily.
3-32
WARNING:
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It is dangerous to get out of the vehicle if the shift
lever is not fully in P (Park) with the parking brake
firmly set. The vehicle can roll.
Do not leave the vehicle when the engine is
running unless you have to. If you have left the
engine running, the vehicle can move suddenly.
You or others could be injured. To be sure the
vehicle will not move, even when you are on fairly
level ground, always set the parking brake and
move the shift lever to P (Park). See Shifting Into
Park on page 3-37. If you are pulling a trailer, see
Towing a Trailer on page 5-30.
Make sure the shift lever is fully in P (Park) before
starting the engine. The vehicle has an automatic
transmission shift lock control system. You must first
press the brake pedal before you can shift from P (Park)
with the ignition in ON/RUN.
If you cannot shift out of P (Park), ease pressure on the
shift lever and push the shift lever all the way into
P (Park) as you maintain brake application. Then move
the shift lever into another gear. See Shifting Out of
Park on page 3-38.