Radio

The operator interfaces with the radio system through the radio display and controls. Through these controls the operator is able to control system power, volume, fade, balance, bass and treble equalization. Control of the integrated tape, single CD or 6 disc CD playback systems is also available when equipped with those options. An LCD (liquid crystal display) provides system feedback to the operator.

The radio processes the AM and FM signals from the antenna system or the information from the cassette tape or CD media sections, amplifies that information and sends the output to the speaker system.

The radio is located in the instrument panel center stack area and is fastened to the instrument panel by two fasteners. Guide pins are provided to aid in aligning radio. Electrical connections to the radio are a 24-way connector from the I/P harness, antenna lead connector and braided ground strap. An additional 12-way harness connector is present on OnStar equipped vehicles. Additional service length is provided in the radio harnesses to allow connection prior to radio installation.

There are four different radios available. They are:
^ AM/FM Stereo with Compartment
^ AM/FM CD with Compartment
^ AM/FM Stereo Cassette/CD
^ AM/FM Stereo Cassette/6 Disc CD

For details on these radios, refer to "Radio Specifications" and "System Checks" procedures.

Clock time is displayed continuously on all radio models even when the ignition is Off. Temporary backlighting is provided if the RCL button is pressed with the ignition Off. Backlighting is On whenever the ignition is On and dims with instrument panel illumination when the vehicle park lights are On.

Radio amplifier outputs to the speakers are protected from damage should speaker leads become shorted-to-ground or shorted-to-vehicle power. The radio will sense these conditions and shut down the amplifier outputs in a non-destructive manner. After the short condition is removed, the radio will return to normal operation.