GMC TopKick 2007 Owner's Manual page 306

You will not see the battery (or batteries) of
your vehicle under the hood. They are located
in a frame mounted battery box, which is
located on either the driver's or the passenger's
side of the vehicle. You will not need to access
your battery (or batteries) for jump starting. The
remote positive (+) terminal is for that purpose.
CAUTION:
{
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.
Be sure the batteries have enough water.
You do not need to add water to the
®
ACDelco battery (or batteries) installed
in your new vehicle.
306
CAUTION: (Continued)
CAUTION: (Continued)
But if a battery has filler caps, be sure the
right amount of fluid is there. If it is low,
add water to take care of that first. If you
do not, explosive gas could be present.
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.
CAUTION:
{
Fans or other moving engine parts can
injure you badly. Keep your hands away
from moving parts once the engine is
running.