Stop/Start System - GMC XT5 2023 Owner's Manual

the cranking motor to cool
down. When the engine
starts, let go of the button
and the accelerator. If the
vehicle starts briefly but
then stops again, do the
same thing. This clears the
extra gasoline from the
engine. Do not race the
engine immediately after
starting it. Operate the
engine and transmission
gently until the oil warms
up and lubricates all
moving parts.

Stop/Start System

The Stop/Start system will
shut off the engine to help
conserve fuel. It has
components designed for the
increased number of starts.
Warning
The automatic engine Stop/
Start feature causes the
engine to shut off while the
vehicle is still on. Do not exit
(Continued)
Warning (Continued)
the vehicle before shifting to
P (Park). The vehicle may
restart and move
unexpectedly. Always shift
to P (Park), and then turn
the ignition off before
exiting the vehicle.
Auto Engine Stop/Start
When the brakes are applied
and the vehicle is at a
complete stop, the engine may
turn off. When stopped, the
tachometer displays AUTO
STOP. See Tachometer 0 125.
When the brake pedal is
released or the accelerator
pedal is pressed, the engine
will restart.
To maintain vehicle
performance, other conditions
may cause the engine to
automatically restart before
the brake pedal is released.
Auto Stops may not occur
and/or Auto Starts may occur
because:
Driving and Operating
The climate control settings
require the engine to be
running to cool or heat the
vehicle interior.
The vehicle battery needs to
charge.
The vehicle battery has
recently been disconnected.
Minimum vehicle speed has
not been reached since the
last Auto Stop.
The accelerator pedal is
pressed.
The engine or transmission
is not at the required
operating temperature.
The outside temperature is
not in the required operating
range.
The vehicle transmission is
shifted out of D (Drive) to
any gear other than P (Park).
Certain driver modes have
been selected. See Driver
Mode Control 0 273.
The vehicle is on a steep hill
or grade.
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