GMC Cadillac CTS 2004 Owner's Manual page 161

Tachometer
CTS shown,
CTS-V similar
Notice: If you operate the engine with the
tachometer in the shaded warning area, your vehicle
could be damaged, and the damages would not
be covered by your warranty. Do not operate
the engine with the tachometer in the shaded
warning area.
This gage indicates
the engine speed in
revolutions per
minute (rpm).
Engine Speed Limiter
This feature prevents the engine from operating at too
many revolutions per minute (rpm). When the engine's
rpm are too high, the throttle is closed to reduce
speed, if this is not sufficient, then the fuel supply to the
engine will be limited. When the rpms return to normal,
the fuel supply will return to normal. This helps
prevent damage to the engine.
Safety Belt Reminder Light
When the key is turned to ON or START, a chime will
come on for several seconds to remind people to fasten
their safety belts, unless the driver's safety belt is
already buckled.
If the driver's belt is already buckled, neither the chime
nor the light will come on.
The safety belt light will
also come on and stay on
for several seconds, then it
will flash for several more.
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