Cadillac 1998 Seville Owner's Manual page 254

If No Steam Is Coming From Your Engine
If you get the overheat warning but see or hear no
steam, the problem may not be too serious. Sometimes
the engine can get a little too hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
0
Tow a trailer.
11
you get the overheat warning with no sign of steam,
try this for a minute or so:
1. Dial temperature control to the highest heat setting
2. If you're in a traffic jam, shift to NEUTRAL (N);
and open the windows, as necessary.
otherwise, shift to the highest gear while
driving
--
OVERDRIVE
(0).
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 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 o f t h e engine and get everyone out
o f the
vehicle until it cools down. Also, see "Overheated
Engine Protection Operating Mode" listed previously in
this section.
You may decide not to lift the hood but to get service
help right away.
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