Pontiac 2004 Bonneville - Manual (Page 164)

Anti-Lock Brake System Warning
Light
With the anti-lock brake system, the light(s) will come
on when your engine is started and may stay on
for several seconds. That is normal.
If the light stays on, turn the ignition to OFF. If the light
comes on when you are driving, stop as soon as
possible and turn the ignition off. Then start the engine
again to reset the system. If the light still stays on,
or comes on again while you are driving, your vehicle
needs service. If the regular brake system warning light
is not on, you still have brakes, but you do not have
anti-lock brakes. If the regular brake system warning
light is also on, you do not have anti-lock brakes
and there is a problem with your regular brakes. See
Brake System Warning Light on page 3-42.
The anti-lock brake system warning light will come on
briefly when you turn the ignition key to ON. This is
normal. If the light does not come on then, have it fixed
so it will be ready to warn you if there is a problem. United States Canada
3-44