GMC C-Series 2001 Owner's Manual page 173

1. Check the other vehicle. It must have a 12
battery with a negative ground system.
NOTICE:
If the other system isn't a 12
negative ground, both vehicles can be damaged.
If you have a diesel engine vehicle with two batteries
(or more), 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.
If your vehicle has more than one battery, use the
battery that's closest to the starter
electrical resistance.
2. Get the vehicles close enough so the jumper cables
can reach, but be sure the vehicles aren't touching
each other. You wouldn't be able to start your
vehicle, and the bad grounding could damage the
electrical systems.
5-6
-
volt
-
volt system with a
--
this will reduce
3. Turn off the ignition on both vehicles. Turn off all
lamps that aren't needed, as well as radios. This will
avoid sparks and help save both batteries, and it
could save your radio.
4. Locate the batteries on each vehicle. Find the
positive (+) and negative (
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
(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.
-
) terminals on each battery.
R
battery