Retained Accessory Power (Rap); Shifting Into Park - Chevrolet Silverado 4500HD 2022 Manual

thermostat in the plug-end of the cord may
exist, which will prevent engine heater
operation at temperatures above
18 °C (0 °F).
Warning
Do not plug in the engine block heater
while the vehicle is parked in a garage or
under a carport. Property damage or
personal injury may result. Always park
the vehicle in a clear open area away
from buildings or structures.
To Use the Engine Heater
1. Turn off the engine.
Check the heater cord for damage. If it is
damaged, do not use it. See your dealer
for a replacement. Inspect the cord for
damage yearly.
2. Plug the cord into the connector near
the battery box.
3. Plug the cord into a grounded 110-volt
AC outlet that is protected by a ground
fault detection function.
Warning
Improper use of the heater cord or an
extension cord can damage the cord and
may result in overheating and fire.
Plug the cord into a three-prong
electrical utility receptacle that is
protected by a ground fault detection
function. An ungrounded outlet could
cause an electric shock.
Use a weatherproof, heavy-duty,
15 amp-rated extension cord if needed.
Failure to use the recommended
extension cord in good operating
condition, or using a damaged heater
or extension cord, could make it
overheat and cause a fire, property
damage, electric shock, and injury.
Do not operate the vehicle with the
heater cord permanently attached to
the vehicle. Possible heater cord and
thermostat damage could occur.
While in use, do not let the heater
cord touch vehicle parts or sharp
edges.
Before starting the vehicle, unplug the
cord. Keep the cord away from any
moving parts.
Driving and Operating
4. Before starting the engine, be sure to
unplug the cord.
The length of time the heater should remain
plugged in depends on several factors. Ask a
dealer in the area where you will be parking
the vehicle for the best advice on this.

Retained Accessory Power (RAP)

Some vehicle accessories may be used after
the ignition is turned off.
The power windows and sunroof,
if equipped, will continue to work for up to
10 minutes or until any door is opened.
The infotainment system will continue to
work for 10 minutes, until the driver door is
opened, or until the ignition is turned on or
placed in ACC/ACCESSORY.

Shifting Into Park

Warning
It can be dangerous to get out of the
vehicle if the automatic transmission 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.
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