Chevrolet 1994 Astro Passenger Owner's Manual page 188

2. Get the vehicles close enough so the jumper cables can reach,
but be
sure the vehicles aren't touching each other. If they are, it could cause a
ground connection you don't want. You wouldn't be able to start your
vehicle, and the bad grounding could damage the electrical systems.
You could be injured if the vehicles roll. Set the parking brake firmly
on each vehicle. Put an automatic transmission
in "P"
(Park) or a
manual transmission in
" N '
(Neutral). If you have a four-wheel-drive
vehicle with a manual transfer case shift lever, be sure the transfer case
is not in
" N '
(Neutral).
needed, and radios. This will avoid sparks and help save both batteries.
And it could save your radio!
3. Turn off the ignition on both vehicles. Turn off all lights that aren't
NOTICE:
If you leave your radio on, it could be badly damaged. The
repairs wouldn't be covered by your warranty.
4. Open the hoods and locate the batteries. Find the positive (+) and
negative
(-)
terminals on each battery.
5-4