GMC SIERRA 2020 Owner's Manual page 361

360 Vehicle Care
For vehicles equipped with the Stop/
Start system:
1. Loosen and remove the
negative battery cable nut (1)
at the battery sensor
connection.
2. Remove the negative battery
cable (2) from the battery
sensor stud.
3. Cover the negative battery
cable terminal, battery sensor
stud, and negative battery post
with a non-conductive material
to prevent any contact with the
negative battery cable.
For vehicles not equipped with the
Stop/Start system:
1. Loosen the negative battery
cable nut (1).
2. Remove the negative battery
cable clamp (2) from the
negative battery post.
3. Cover the negative battery
cable clamp, and negative
battery post with a
non-conductive material to
prevent any contact with the
negative battery cable.
Negative Battery Cable
Reconnection
Caution
When reconnecting the battery:
Use the original nut from the
vehicle to secure the
negative battery cable. Do
not use a different nut.
If you need a replacement
nut, see your dealer.
Tighten the nut with a hand
tool. Do not use an impact
wrench or power tools to
tighten the nut.
The vehicle could be damaged if
these guidelines are not followed.
Caution
Do not use paints, lubricants,
or corrosion inhibitors on the nut
that secures the negative battery
cable to the vehicle. This could
damage the vehicle.