Range Inhibit Warning Indicator; Brake System Warning Light - GMC T-Series 2007 Owner's Manual

Range Inhibit Warning Indicator

If your vehicle has an Allison 1000/2000/2200/2400/
2500 series automatic transmission, this light may
come on and a lighted bar under the current gear
selected will flash.
If your vehicle has an Allison 3000/3500 series
automatic transmission, the current gear selected
on the pushbutton display will flash.
The flashing bar, light, or gear selection indicates
that transmission range shifts may not occur.
For detailed information on shift inhibit limitations,
see the Allison Automatic Transmission Operator's
Manual in your vehicle for further information.
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Your vehicle may have
this light.

Brake System Warning Light

Your vehicle has either hydraulic or air brakes.
Each system has different warning lights.
Hydraulic Brake System Warning
Lights
Vehicles with hydraulic brake systems have
two brake system warning lights on the
instrument panel.
When it comes on, you will also hear a
warning tone.
This light should come on briefly when you turn
the ignition key to ON. If it does not come on, then
have it fixed so it will be ready to warn you if
there is a problem.
If this light comes on,
the fluid level in the
master cylinder reservoir
is low or there is a
problem with the
hydraulic brakes.