GM Service Manual Online
For 1990-2009 cars only

Radio

The following radios are available:


Object Number: 290013  Size: SH
    • AM-FM Stereo, Seek/Scan, Clock (UM7)

Object Number: 290015  Size: SH
    • AM-FM Stereo, Seek/Scan, Clock, Auto Reverse Music Search Cassette (UN6)

Object Number: 290019  Size: SH
    • AM-FM Stereo, Seek/Scan, Clock, Auto Reverse Cassette, Equalizer (UT6)

Object Number: 311042  Size: SH
    • AM-FM Stereo, Seek/Scan, Clock, Compact Disc (U1C)

Object Number: 290017  Size: SH
    • AM-FM Stereo, Seek/Scan, Clock, Compact Disc, Equalizer (UP3)

AM

The range for most AM (Amplitude Modulated) stations is greater than for FM (Frequency Modulation) especially at night. The longer range can cause stations to interfere with each other.

In order to reduce the noises like storms and power lines that AM can pick up, reduce the treble.

FM Stereo

The FM (Frequency Modulation) stereo provides the best sound. The FM signals, will reach approximately 16-65 km (10-40 miles). Tall buildings or hills can interfere with the FM signals causing the sound to increase and decrease. In order to improve the poor reception, tune to a stronger station.

All factory-equipped sound systems with a FM stereo radio will perform the following functions:

    • Switch to stereo operation whenever an FM stereo broadcast is being received
    • A STEREO or ST indicator will light on the display.

Stereo operation is defined as the radio is separating a stereo broadcast back into the original 2 channels:

    • Left
    • Right

Multiple Compact Disc Player


Object Number: 311047  Size: SH

Object Number: 311045  Size: SH

Vehicles equipped with the U1S option code have an audio system with a rear compartment-mounted multiple compact disc player. This player is capable of playing 1-12 compact discs continuously.