For 1990-2009 cars

A problem with radio reception may not mean there is a problem with your radio -- it may be the normal result of conditions outside the vehicle.

### FM Stereo

FM stereo will give the best sound, but FM signals will reach only about 10 to 40 miles (16 to 65 km). Tall buildings or hills can interfere with FM signals, causing the sound to fade and drift.

You may also notice a loss of reception if two signals reach your antenna at the same time. If you notice that the FM signal you are listening to is interrupted or weakened, it is due to another stronger station nearby.

### AM

The range for most AM stations is greater than for FM, especially at night. The linger range, however, can cause stations to interfere with each other. AM can pick up noise from things like storms and power lines. Try reducing the treble to improve sound quality if this interference occurs.

### How OnStar® Will Affect Your Radio (If Equipped)

You will not be able to listen to the radio while you are receiving a voice communication from the OnStar® Advisor. Vehicle equipped with OnStar® use the amplifier and speaker system of the radio for voice communication from the OnStar® Advisor to the vehicle.

### Time of Day Display

When the vehicle is off, the time of day display remains displayed on the radio. To view the time of day with back lighting, press the RCL button and the display will light up for 5 seconds.