Brake System Warning Light - Hummer 2008 H2 Owner's Manual

Readings in the low warning zone may occur when a
large number of electrical accessories are operating
in the vehicle and the engine is left at an idle for
an extended period. This condition is normal since
the charging system is not able to provide full power
at engine idle. As engine speeds are increased,
this condition should correct itself as higher engine
speeds allow the charging system to create full power.
If there is a problem with the battery charging system,
this light will come on or the SERVICE BATTERY
CHARGING SYSTEM DIC message will display.
See DIC Warnings and Messages on page 3-56
and Charging System Light on page 3-37 for
more information.

Brake System Warning Light

With the ignition on, the brake system warning
light will come on when you set the parking brake.
If you try to drive with the parking brake engaged,
a chime will sound when the vehicle speed is
greater than 5 mph (8 km/h).
3-38
Your vehicle's hydraulic brake system is divided into
two parts. If one part is not working, the other part
can still work and stop you. For good braking, though,
you need both parts working well.
If the warning light comes on and a chime sounds there
could be a brake problem. Have your brake system
inspected right away.
This light may also come on due to low brake fluid.
See Brakes on page 5-36 for more information.
United States
This light should come on briefly when you turn the
ignition key to RUN. If it does not come on then,
have it fixed so it will be ready to warn you if there
is a problem.
Canada