Global Machinery Company Sierra 1999 - Manual (Page 265)

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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
don’t need to add water to the ACDelco
Freedom
R
battery (or batteries) installed in
every new GM vehicle. 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 don’t, explosive gas could be present.
Battery fluid contains acid that can burn you.
Don’t 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.
5. Check that the jumper cables don’t have loose or
missing insulation. If they do, you could get a shock.
The vehicles could be damaged too.
Before you connect the cables, here are some basic
things you should know. Positive (+) will go to
positive (+) or a remote positive terminal if the
vehicle has one. Negative (
- ) will go to a metal
engine part or a remote negative terminal if the
vehicle has one. Don’t connect positive (+) to
negative (
- ) or you’ll get a short that would damage
the battery and maybe other parts too.
On vehicles equipped with dual batteries, make all
battery connections to the remote positive (+) and
remote negative (
- ) terminals.
CAUTION:
Fans or other moving engine parts can injure you
badly. Keep your hands away from moving parts
once the engine is running.