Battery - North America - GMC HUMMER EV 2022 Manual

92 Vehicle Care
1. Battery (Under Cover). See Battery -
North America 0 92.
2. Underhood Compartment Fuse Block
(Under Cover). See the owner's manual.
3. Coolant Surge Tank and Pressure Cap
(Under Cover). See the owner's manual.
4. Brake Fluid Reservoir (Under Cover). See
the owner's manual.
5. Windshield Washer Fluid Reservoir. See
the owner's manual.

Battery - North America

The original equipment battery is
maintenance free. Do not remove the cap
and do not add fluid.
This vehicle has a high voltage battery and
a standard 12-volt battery.
{
Warning
Damage to the high voltage battery or
high voltage system can create a risk of
electric shock, overheating, or fire.
If the vehicle is damaged from a
moderate to severe crash, flood, fire,
or other event, the vehicle should be
inspected as soon as possible. Until the
Warning (Continued)
vehicle has been inspected, store it
outside at least 15 m (50 ft) from any
structure or anything that can burn.
Ventilate the vehicle by opening a
window or a door.
Contact Customer Assistance as soon as
possible to determine whether an
inspection is needed. See the owner's
manual.
If the vehicle is in a crash, the sensing
system may shut down the high voltage
system. When this occurs, the high voltage
battery is disconnected and the vehicle will
not start. The SERVICE VEHICLE SOON
message in the Driver Information Center
(DIC) will display. Before the vehicle can
operate again, it must be serviced at your
dealer.
See "If a Crash Occurs" in the owner's
manual for additional information. If an
airbag inflates, see What Will You See after
an Airbag Inflates? 0 29.
Only a trained service technician with the
proper knowledge and tools should inspect,
test, or replace the high voltage battery.
(Continued)
See your dealer if either the 12-volt or
high voltage battery needs service.
The dealer has information on how to
recycle the high voltage battery.
There is also information available at
https://www.recyclemybattery.com.
Keep the vehicle plugged in, even when fully
charged, to keep the high voltage battery
temperature ready for the next drive. This is
important when outside temperatures are
extremely hot or cold.
Propulsion power may be reduced in
extremely cold temperatures, or if the high
voltage battery is too cold. The message
BATTERY TOO COLD, PLUG IN TO WARM will
display. If the message displays, a level 2
charger is required to heat the battery to a
minimum temperature to enable propulsion
or charging.
A vehicle cover, which can reduce sun
loading on the vehicle and improve high
voltage battery life, is available from your
dealer.
Refer to the replacement number shown on
the original battery label when a new 12-volt
battery is needed. The vehicle has an
Absorbed Glass Mat (AGM) 12-volt battery.
Installation of a standard 12-volt battery will
result in reduced 12-volt battery life.