GMC 2006 Sierra - Manual (Page 212)

Tachometer
Your tachometer displays the engine speed in
revolutions per minute (rpm). See “Grade Braking
(Allison Transmission
® )” under Tow/Haul Mode on
page 2-31 for more information.
Notice: If you operate the engine with the
tachometer in the solid red area, your vehicle could
be damaged. The damages would not be covered by
your warranty. Do not operate the engine in the solid
red area.
Safety Belt Reminder Light
When the key is turned to RUN or START, a chime will be
provided for several seconds to remind people to buckle
their safety belts. The driver safety belt light will also be
provided and stay on for several seconds, then it will flash
for several more. You should buckle your seat belt.
This chime and light will
be repeated if the driver
remains unbuckled and
the vehicle is in motion.
See DIC Warnings and Messages on page 3-55 for
more information on driver and passenger safety
belt reminders.
If the driver’s belt is buckled, neither the chime nor the
light will come on.
See Passenger Sensing System on page 1-81 for more
information.
3-34