Reduced Engine Power Light; Highbeam On Light; Daytime Running Lamps (Drl) Indicator - GMC 2010 T-Series Owner's Manual

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 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 service engine soon light stays on, the
vehicle should be taken to your dealer/retailer as soon
as possible for service.
3-36
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.

Highbeam On Light

See Headlamp High/Low-Beam Changer on page 3 8
for more information.
Daytime Running Lamps (DRL)
Indicator Light
See Daytime Running Lamps (DRL) on page 3 13 for
more information.
This light comes on when
the high-beam headlamps
are in use.
This light turns on
whenever the Daytime
Running Lamps are on.