Buick REGAL 1997 Manual page 207

Enhanced Traction System (Option: Not
Available with 3800 Supercharged Engine)
Your vehicle may have Enhanced Traction System
(ETS) that limits wheel spin. This is especially useful in
slippery road conditions, The system operates only if
it
senses that one or both of the front wheels are spinning
or beginning to lose traction. When this happens, the
system reduces engine power and may also upshift the
transaxle to limit wheel spin.
LOW TRAC
This light will come on
when your Enhanced
Traction System is limiting
wheel spin. See "Enhanced
Traction System Active
Light" in the Index. You
may feel or hear the system
working, but this is normal.
The Enhanced Traction System operates in all transaxle
shift lever positions. But the system can upshift the
transaxle only as high as the shift lever position you've
chosen, so you should use the lower gears only when
necessary. See "Automatic Transaxle" in the Index.
TRAC
OFF
When the system is on and
the parking brake is fully
released, this warning light
will come on to let you
know if there's a problem
with the system.
See "Enhanced Traction System Warning Light" in the
Index. When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
To limit wheel spin, especially in slippery road
conditions, you should always leave the Enhanced
Traction System on. But you can turn the system off if
you ever need to. (You should turn the system off if your
vehicle ever gets stuck in sand, mud, ice or snow. See
"Rocking Your Vehicle" in the Index.)
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