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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1517 (Entertainment System) >> Description and Operation >> Radio/Audio System Description and Operation >> Radio/Audio System Description >> RPO U1S

RPO U1S

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Compact Disc Changer
GM194730Courtesy of GENERAL MOTORS CORP.

Remote compact disc changer (available with ULO or UNO)

Fig 2: Audio System Components - Coupe
GM65667Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Front Door Speaker Assembly RH
2 Radio Control
3 Windshield Antenna
4 Rear Speaker Assembly RH
5 Antenna Buffer
6 Rear Lift Window Antenna Cable
7 Rear Lift Window Antenna
8 Remote CD Changer
9 Rear Speaker Assembly LH
10 Rear Lift Window Antenna Coaxial Extension Cable
11 Antenna Module
12 Front Windshield Antenna Coaxial Cable
13 Front Door Speaker Assembly LH
14 Radio Control Coaxial Cable
15 Bose® Signal Processing Module
Fig 3: Audio System Components - Convertible
GM280591Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Front Door Speaker Assembly RH
2 Radio Control
3 Power Antenna Coaxial Extension Cable
4 Rear Speaker Assembly RH
5 Power Antenna Assembly
6 Remote CD Changer
7 Rear Speaker Assembly LH
8 Front Door Speaker Assembly LH
9 Bose® Signal Processing Module
Fig 4: Audio System Components - Hardtop
GM380280Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 Front Door Speaker Assembly RH
2 Radio Control
3 Fixed Antenna Coaxial Extension Cable
4 Rear Speaker Assembly RH
5 Fixed Antenna Assembly
6 Remote CD Changer
7 Rear Speaker Assembly LH
8 Front Door Speaker Assembly LH
9 Bose® Signal Processing Module

The following is included in each audio system:

The Electronically Tuned Receiver (ETR) utilizes a programmer and synthesizer to provide optimum sound reproduction. The ETR incorporates an electronic memory for preselected station and digital clock function. Reset the memory whenever the battery is disconnected.

Each system has a vacuum fluorescent (VF) display that coordinates with the other instrument panel (I/P) displays. The Body Control Module (BCM) controls the dimming of the display based on inputs from the I/P cluster which reads adjustments of the I/P cluster dimmer switch (rheostat). The Light Emitting Diode (LED) and the back lighting of the radio face is done with incandescent light powered directly by the I/P cluster dimmer switch (rheostat).