Exhaust Brake Indicator Light
For vehicles with an
exhaust brake, this light
is located above the
climate controls.
The exhaust brake indicator light will come on
and stay on whenever the diesel engine exhaust
brake or exhaust restrictor is active. For more
information, see Diesel Engine Exhaust Brake
on page 74.
Differential Lock Indicator Light
If your vehicle has this
feature, this light is
located in the center of
the instrument panel.
The light is on when the
inter-axle differential lock
system is in use.
The light will come on momentarily during starting.
If the light fails to come on, have it repaired as
soon as possible so you will be aware when
the lock system is in use.
Reduced Engine Power Light
If the check engine and
reduced engine power
lights are on, the throttle
may be disabled, and a
noticeable change in the
vehicle’s performance
may occur.
If the reduced engine power light is on, but there
is no change in performance, proceed to your
destination. The performance may be reduced the
next time the vehicle is driven. The vehicle may
be driven at a slower speed while the reduced
engine power light is on, but acceleration
and speed may be limited.
Anytime the check engine light stays on, the
vehicle should be taken to an authorized dealer
as soon as possible for service.
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