Buick 1994 Roadmaster Owner's Manual page 203

If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. Turn off your air conditioner.
2. Turn on your heater to full hot at the highest fan
3. If you're in a traffic jam, shift to
" N '
(Neutral).
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about ten minutes.
If the warning doesn't come back'on, you can drive
normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there's still no sign of steam, you can idle the engine
for two or three minutes while you're parked, to see if
the warning stops. But then, if you still have the
warning, TURN OFF THE ENGINE AND GET
EVERYONE OUT OF THE VEHICLE until it cools
down.
You may decide not to lift the hood but to get service
help right away.
speed and open the window as necessary.
Wheri you decide it's safe to lift the hood, here's what
you'll see:
0
Coolant surge tank with pressure cap
Electric engine fans
201