Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Radio/Audio System Description and Operation: Notes
Battery positive voltage is provided to the radio from the Radio/Amp (25A) fuse in the fuse block. The radio is grounded through a braided cable case ground. The radio is enabled/disabled by class 2 messages from the body control module (BCM). The entertainment system on this vehicle is configured with a base and uplevel system. The base and uplevel systems contain a radio, antenna, speakers, and on some vehicles an audio amplifier.
The uplevel system differs from the base system by providing the customer with enhanced audio system features. Some of those features may include an audio amplifier, and programmable equalizer (EQ). Satellite digital radio (U2K) is available with the uplevel systems.
The following list shows the audio system RPOs available with this vehicle:
- Base Radio (U1C) - AM/FM Stereo, EQ, CD
- Uplevel Radio (UN0) - AM/FM Stereo, Multiple CD, EQ
- Uplevel Radio (U1V) - AM/FM Stereo, EQ, Six Disc CD
- Uplevel Radio (U3L) - AM/FM Stereo, EQ, CD, MP3
- Satellite Digital Radio - (U2K)
- Speaker system custom - 6 (UW6)
- Speaker System premium - 9 (U88) - Includes subwoofer and amplifier
| Controls | Base U1C | Uplevel UN0 | Uplevel U1V | Uplevel U3L |
|---|---|---|---|---|
| Power | Push PWR/VOL knob to turn radio on. | |||
| Volume | The volume is adjusted by rotating the PWR/VOL knob. | |||
| Speed Compensated Volume | Press the AUTO VOL button. | |||
| Band | Push the BAND button. | |||
| Tune | Turn the TUNE/SELECT/RCL knob. | |||
| Seek | Momentarily press SEEK/SCAN button. | |||
| Scan | Hold SEEK/SCAN button for 4 seconds, until a single beep is heard. | |||
| Preset Scan | Press and hold SEEK/SCAN button for more than 4 seconds until a double beep is heard. | |||
| Presets | Six AM, Six FM1, and Six FM2. | Six AM, Six FM1, and Six FM2 (also six XM1 and six XM2 if equipped with U2K) | ||
| Preset Saving | Press and hold desired preset button until an audible beep is heard. | |||
| Preset Scan | Press SEEK/SCAN button for more than 4 seconds. | |||
| Set Clock | Press and hold the H button until the correct hour appears on the display. Press and hold the M button until the correct minute appears on the display. The time can be set with the ignition on or off. | Press and hold the H button until the correct hour appears on the display. AM or PM will appear on the display. Press and hold the M button until the correct minute appears on the display. The time can be set with the ignition on or off. | ||
| Recall | Push the DISP button. | |||
| Mute | Push the mute button on the steering wheel controls (if equipped with UK3) | |||
| Fade/Balance | Press the BAL/FADE button to select and adjust with the SELECT knob. To center a setting, press and hold the BAL/FADE button with the desired range selected. To center all ranges, push and hold the BAL/FADE button once, without selecting a range. | |||
| Bass/ Treble/ Midrange | Press TONE button to select and adjust with the SELECT knob. To center a setting, press and hold the BAL/FADE button with the desired range selected. To center all ranges, push and hold the BAL/FADE button once, without selecting a range. | |||
| Programmable EQ (AUTO TONE) | N/A | Press EQ button. | ||
| Controls | Base U1C | Uplevel UN0 | Uplevel U1V | Uplevel U3L |
|---|---|---|---|---|
| Source | Press the CD button to select CD player | |||
| Eject Single CD | Press the EJECT button | Press the EJECT button. Select disc to eject. | Press the EJECT button | |
| Load Single CD | Press the LOAD button | Press the LOAD button. Select CD slot to load. | Press the LOAD button | |
| Eject all CDs | N/A | Press and hold the EJECT button. | N/A | |
| Load all CDs | N/A | Press and hold the LOAD button. | N/A | |
| Fast Forward | Press and hold Fast Forward button. | |||
| Reverse | Press and hold Fast Reverse button. | |||
| Previous | Press the SEEK up button. | |||
| Next | Press the SEEK down button. | |||
| Random | Press the RDM button. Press again to cancel. | Press the RDM button to listen to tracks on selected CD in random order. Press and hold for more than 2 seconds to random play tracks on ALL CDs that are loaded. Press again to cancel. | Press the RDM button. Press again to cancel. | |
| Repeat | N/A | Press the RPT button to repeat track that is currently playing. Press again to cancel. Press and hold RPT button for more than 2 seconds to repeat entire CD that is currently playing. | N/A | |
| Select Disc | N/A | Press the numbered push-button (preset button) that corresponds with the desired disc. | N/A | |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.