GMC 2009 Sierra - Manual (Page 352)

Vehicle Storage
{ CAUTION:
Batteries have acid that can burn you and
gas that can explode. You can be badly hurt
if you are not careful. See Jump Starting
on page 5-40 for tips on working around a
battery without getting hurt.
Infrequent Usage: If you drive your vehicle infrequently,
remove the black, negative (
−
) cable from the battery.
This will help keep the battery from running down.
Extended Storage: For extended storage of your vehicle,
remove the black, negative (
− ) cable from the battery
or use a battery trickle charger. This will help maintain
the charge of the battery over an extended period
of time.
Jump Starting
If your vehicle’s battery (or batteries) has run down,
you may want to use another vehicle and some
jumper cables to start your vehicle. Be sure to use
the following steps to do it safely.
{ CAUTION:
Batteries can hurt you. They can be dangerous
because:
• They contain acid that can burn you.
• They contain gas that can explode or
ignite.
• They contain enough electricity to
burn you.
If you do not follow these steps exactly,
some or all of these things can hurt you.
5-40