Chevrolet Silverado 4500HD 2022 Owner's Manual page 319

The discharged batteries remote positive (+)
terminal is under a red cover. Remove the
cover to expose the terminal.
1. Check the other vehicle. It must have a
12-volt battery with a negative ground
system.
Caution
If the other vehicle does not have a
12-volt system with a negative ground,
both vehicles can be damaged. Only use
a vehicle that has a 12-volt system with a
negative ground for jump starting.
2. With the vehicle having two batteries,
you should know before you begin that,
especially in cold weather, you may not
be able to get enough power from a
single battery in another vehicle to start
your diesel engine. Using the battery
that is closer to the starter will reduce
electrical resistance.
3. Get the vehicles close enough so the
jumper cables can reach, but be sure the
vehicles are not touching each other.
If they are, it could cause an unwanted
ground connection. You would not be
able to start your vehicle, and the bad
grounding could damage the electrical
systems.
To avoid the possibility of the vehicles
rolling, set the parking brake firmly on
both vehicles involved in the jump start
procedure. Put the automatic
transmission in P (Park) or a manual
transmission in Neutral before setting
the parking brake. If you have a
four-wheel-drive vehicle, be sure the
transfer case is in a drive gear, not in
N (Neutral).
Caution
If any accessories are left on or plugged
in during the jump starting procedure,
they could be damaged. The repairs
would not be covered by the vehicle
warranty. Whenever possible, turn off or
unplug all accessories on either vehicle
when jump starting.
4. Turn the ignition off on both vehicles.
Unplug unnecessary accessories plugged
into the accessory power outlets. Turn
off the radio and all the lamps that are
Vehicle Care
not needed. This will avoid sparks and
help save both batteries. And it could
save the radio!
5. Locate the positive (+) and negative ( )
terminal locations on the other vehicle.
Warning
Using a match near a battery can cause
battery gas to explode. People have been
hurt doing this, and some have been
blinded. Use a flashlight if you need
more light.
Battery fluid contains acid that can burn
you. Do not get it on you. If you
accidentally get it in your eyes or on
your skin, flush the place with water and
get medical help immediately.
Warning
Fans or other moving engine parts can
injure you badly. Keep your hands away
from moving parts once the engine is
running.
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