The Entertainment System on this vehicle is configured with either a base or an uplevel system. Both the base and uplevel systems contain a radio, antenna, speakers, and an audio amplifier. Satellite digital radio (U2K) is available with Uplevel Radio (U2V).

The following list shows the radios available for this vehicle:

Each item in the list below represents topics covered in detail below.

Radio Signal

The radio signal is sent from a broadcast station and is then received by an antenna. The strength of the signal received depends on the following:

AM Reception

The AM band has a lower frequency range than the FM band. These longer wavelengths:

The AM frequencies have longer range due to the ground wave. The ground wave follows the curvature of the earth and is effected by its conductivity. Greater conductivity equates to less signal loss thus transmission over water is better than over land. The AM band has a range of 80-320 km (50-200 miles).

FM Reception

The shorter wavelengths of the higher frequency FM band:

Broadcasts in the FM band are limited to line of sight reception which is typically 40 km (25 miles). Even when out of a direct line of sight, the signal may be reflected into areas that would be in a shadow otherwise. Factors which affect the line of sight include:

XM satellite radio provides digital radio reception. The XM signal is broadcast from two satellites and, where necessary, terrestrial repeaters. The high power satellites allow the antenna to receive the XM signal even when foliage and other partial obstructions block the antennas view of the satellite. Terrestrial repeaters are used in dense urban areas. These repeaters will receive the satellite signal and re-broadcast them at much higher power levels in order to ensure reception in areas with densely packed tall buildings.

The diversity antenna system uses both front and back windows with an integral antenna built between the glass layers of the windshield and as an applique to the rear glass. Any damage to the antenna requires replacing the glass.

A diversity antenna system is designed to deliver the best radio signal reception possible. Two antennas are used to form a diversity system. The primary antenna is part of the rear window and looks similar to the defogger grid. This antenna receives both AM and FM signals. The secondary antenna is part of the front windshield and receives only FM signals.

The antenna reception signals are sorted out by the radio antenna module. The radio antenna module is enabled when the radio is turned on. When the AM or FM band is selected on the radio, the antenna module connects the rear window antenna directly to the radio. In addition, when the FM band is selected an enable signal is sent to the antenna module. Superimposed on this enable signal is the strength of the signal being received by the radio tuner. The antenna module now performs 2 functions. It switches between the front and rear antennas, monitoring the radio signal strength and combines both signals and phase aligns them to create 1 strong signal.

The radio supplies low level audio signals to the audio amplifier in order to boost the signal sent to the speakers.

The radio uses the antenna input signal to create a stereo audio output signal, which is sent at the user-defined volume level to the audio amplifier. The audio amplifier amplifies the signal and sends it to the appropriate speakers. Tone, balance and fade information is sent by the radio to the audio amplifier via the class 2 communication circuit. Additional output processing is provided by the noise-canceling microphone. The microphone monitors interior ambient noise allowing the audio amplifier to modify the audio output. This maintains the sound at an enjoyable level.

The Theftlock theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the run power mode message, it compares the VIN information it has stored to the VIN information received from the dash integration module (DIM) on the class 2 serial data circuit. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place, a DTC will set, the radio will not respond to any button presses and become inoperative. The 2 scenarios able to cause this condition are:

1. A radio is installed from another vehicle
2. The DIM is replaced and not properly setup with the correct VIN information for that vehicle

The only way to unlock the radio is by using a scan tool. Always refer to the table in this section to diagnose the Theftlock DTC for further information.

This feature allows 2 different drivers to store and recall specific radio settings. The settings recalled by the radio are determined by which remote keyless entry (RKE) transmitter (1 or 2) is used to enter the vehicle. The number on the back of the RKE transmitter corresponds to driver 1 or driver 2. The radio settings automatically adjust to where they were last set by the identified driver.

The radio can store home and away presets. Home and away presets allow you to use 1 set of preset radio settings in the area where you live, and another set when you go out of town. You do not need to reprogram your presets every time you travel. To change between home and away presets, perform the following steps:

w/U2R or U2S

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until H/A HOME PRESETS is displayed.
3. Press the TUNE/SEL knob to change.

w/U2V, U2Y, or U2X

1. From the Radio menu, press the TUNE/SEL knob.
2. Use the keys on the right to select Home P-Sets or Away P-Sets.

When battery power is removed and later applied, you do not have to reset your home radio presets because the radio remembers the presets. However, you do have to reset the away radio presets.

The soft keys on either side of the display can be programmed for different functions. To program the soft keys, perform the following steps:

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until SETUP is displayed; press the knob to select.
3. Turn the TUNE/SEL knob until CONFIGURE DISPLAY KEYS is displayed; press the knob to select.
4. Turn the TUNE/SEL knob to select the key to be programmed; press the knob to select. The current assigned feature is displayed.
5. Turn the TUNE/SEL knob to select the feature that you would like to assign to the key; press the knob to select.

All audio systems are equipped with technology known as the Radio Data System (RDS). RDS is a system that sends data along with the audio of the FM station you are currently tuned to. RDS is a standard that defines how a FM broadcast station may send digital data along with the audio program. Think of it as a 1 way wireless modem, allowing the broadcaster to send information about his program to your receiver.

RDS data is carried in what is known as a "subcarrier". A subcarrier is a frequency that the FM broadcaster is authorized to use to send data or other audio programs that are not audible in the main audio program. RDS information can be used to display program information and to control the radio.

To receive the RDS signal, all that is needed is an FM receiver with an RDS circuit. A special integrated circuit capable of dealing with the RDS signal is in the RDS circuit and passes it along to the receiver's microprocessor where it is decoded and acted upon.

RDS Basic Information

RDS basic information:

In some cases, a radio station broadcasting incorrect information may cause the RDS features of the radio to appear to work improperly.

Broadcast RDS information can be used in a variety of ways by the receiver and listener, but basically falls into 2 categories: Display and Control.

Displaying Program Information

RDS displays textual information such as:

RDS Traffic Feature (TA) w/U2R or U2S

This feature allows the radio to receive traffic announcements even with the volume muted, or when a CD or cassette is playing. When TA is on, the radio will search for another station with TA if the current station is not TA capable. To turn TA on or off, perform the following steps:

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until TRAFFIC ANNOUNCE appears on the display.
3. Press the TUNE/SEL knob to select. An X will appear in the box when TA is on.

RDS Traffic Feature w/U2V, U2Y, or U2X

This feature allows the radio to receive traffic announcements even with the volume muted, or when a CD or cassette is playing. When TRAFFIC is on, the radio will search for another station with traffic if the current station is not capable. To turn TRAFFIC on or off, press the TRAFFIC button.

Viewing Messages w/U2R or U2S

When MSG appears on the radio display, a new message is available for viewing. These messages are from the RDS broadcaster and may be general information such as artist and song title. To view the text message, perform the following steps:

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until RECALL RDS MESSAGE appears on the display.
3. Press the TUNE/SEL knob to select. The last message displayed will be displayed again.

Using Program Type Presets w/U2R or U2S

The radio has the ability to use RDS data to find stations according to program type (PTY). When in PTY mode the preset buttons are now PTY presets instead of frequency presets. To turn PTY mode on or off, perform the following steps:

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until PROGRAM TYPE MODE appears on the display.
3. Press the TUNE/SEL knob to select. An X will appear in the box when PTY is on.

Using RDS Seek w/U2V, U2Y, or U2X

The radio has the ability to use RDS data to find stations according to program type. To select program type perform the following steps:

1. From the Radio menu, press the TUNE/SEL.
2. Select RDS List.
3. Select the program types to search for.
4. Select Seek RDS List to search for these program types.

XM is a national satellite radio service that offers up to 100 coast to coast channels including music, news, sports, talk and children's programming. XM provides digital quality audio and text information, including song title and artist name. A service fee is required in order to receive the XM service. For more information, contact XM at www.xmradio.com or call 1-800-852-9696.

Digital Radio Receiver

The radio controls communicate with the digital radio receiver via the class 2 communication circuit. The digital radio receiver sends remote radio audio signals to the radio.

Viewing Messages

Press the DISP or RCL button while in XM mode to view various pieces of information related to the current song or channel. By pressing and releasing the DISP or RCL button, you may view four different categories of information: Artist Name/Feature, Song/Program Title, Channel Category, and other Additional Information that may be broadcast on that channel. Additional Information messages may not always be available. If an Additional Information message is being broadcast on the tuned channel, the INFO icon will appear on the display. Each of the four information types may have multiple pages of text. To reach a category, press and release the DISP or RCL button consecutively until the desired type is displayed. If there are multiple pages of text for the selected information type, the radio will automatically display all the pages for that type at a rate of approximately one page every three seconds before timing out and returning to the default display. You may override this feature by pressing the DISP or RCL button to review all of the pages at your own pace.

Some audio functions are available using the steering wheel controls. The steering wheel controls consist of multiple momentary contact switches that connect a series of resistors. When a steering wheel control button is pressed, a specific resistance value is noted by the radio. This results in a generated voltage, unique to the particular button.

The four buttons on the left side of the steering wheel can be programmed for different functions. To program the buttons, perform the following steps:

w/ U2R or U2S

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until SETUP is displayed; press the knob to select.
3. Turn the TUNE/SEL knob until CONFIGURE SWC KEYS is displayed; press the knob to select.
4. Turn the TUNE/SEL knob to select the button to be programmed; press the knob to select. The current assigned feature is displayed.
5. Turn the TUNE/SEL knob to select the feature that you would like to assign to the button; press the knob to select.

w/ U2V, U2Y, or U2X

1. Press the MAIN button.
2. Press the Setup button.
3. Press the Prog SWC soft key.