Cliff: Created page with "'''Audio RPO codes''' are RPO codes used to identify factory radio, speaker, stereo, and sound-system equipment on the Pontiac Fiero. For a complete searchable list of Fiero RPO and option codes, see: * Fiero RPO code list == Overview == Audio RPO codes help identify the radio, speaker system, stereo provisions, or upgraded audio equipment originally assigned to a Fiero. These codes may appear on the Service parts identification label along with pain..."

2026-07-22T12:30:57Z

Created page with "'''Audio RPO codes''' are RPO codes used to identify factory radio, speaker, stereo, and sound-system equipment on the Pontiac Fiero. For a complete searchable list of Fiero RPO and option codes, see: * Fiero RPO code list == Overview == Audio RPO codes help identify the radio, speaker system, stereo provisions, or upgraded audio equipment originally assigned to a Fiero. These codes may appear on the Service parts identification label along with pain..."

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'''Audio RPO codes''' are [[RPO codes]] used to identify factory radio, speaker, stereo, and sound-system equipment on the [[Pontiac Fiero]].

For a complete searchable list of Fiero RPO and option codes, see:

* [[Fiero RPO code list]]

== Overview ==

Audio RPO codes help identify the radio, speaker system, stereo provisions, or upgraded audio equipment originally assigned to a Fiero.

These codes may appear on the [[Service parts identification label]] along with paint, trim, engine, transmission, wheel, tire, and other factory build codes.

The RPO code identifies original factory equipment. It does not necessarily prove which radio, speakers, amplifier, or wiring are currently installed, because audio systems are commonly replaced or modified.

Related topics:

* [[Service parts identification label]]
* [[RPO codes]]
* [[Fiero RPO code list]]
* [[Factory radio]]
* [[Performance Sound]]

== Audio codes ==

{| class="wikitable sortable"
! Code
! Description
! Category
! Notes
|-
| UL1
| ETR AM/FM stereo with clock
| Audio
| —
|-
| UL5
| Radio delete
| Audio
| —
|-
| UL6
| AM radio with clock
| Audio
| Listed for 1984
|-
| UM4
| ETR AM/FM stereo with seek/scan, auto-reverse, and clock
| Audio
| —
|-
| UM6
| ETR AM/FM stereo with clock, cassette, auto-reverse cassette, and seek/scan
| Audio
| Listed for 1985-1988
|-
| UM7
| ETR AM/FM stereo with clock and seek/scan
| Audio
| Listed for 1986-1987
|-
| UQ6
| Subwoofer / Performance Sound speaker equipment
| Audio
| Listed for 1986-1988
|-
| UT4
| ETR AM/FM stereo with auto-reverse, seek/scan, equalizer, clock, and touch controls
| Audio
| Listed for 1985-1987
|-
| UU6
| ETR AM/FM stereo with clock, cassette, equalizer, and seek/scan
| Audio
| —
|-
| UU7
| ETR AM/FM stereo with cassette
| Audio
| Listed for 1984
|-
| UU9
| ETR AM/FM stereo
| Audio
| Listed for 1984
|-
| UW5
| Provisions for stereo installation
| Audio
| —
|-
| UX1
| ETR AM/FM stereo with cassette, clock, search/replay, seek/scan, and equalizer
| Audio
| Listed for 1985-1988
|-
| U63
| AM monaural radio without clock
| Audio
| —
|-
| U66
| Four-speaker system
| Audio
| Dual front dash speakers and dual rear/quarter speakers
|}

== Performance Sound ==

'''UQ6''' is commonly associated with the Fiero factory upgraded sound system usually called [[Performance Sound]].

Performance Sound added a factory subwoofer system and related audio equipment. Because many Fieros have had radios, speakers, wiring, or amplifiers changed, the presence of UQ6 on the Service Parts Identification label identifies the original factory equipment, not necessarily the car's current audio system.

Related topics:

* [[Performance Sound]]
* [[Factory radio]]
* [[Interior]]

== Radio delete ==

'''UL5''' identifies radio-delete equipment.

A radio-delete car may have been built without the usual factory radio installed. However, a radio-delete RPO code does not prove the car still has no radio, because owners often added radios later.

When documenting a car, compare the RPO label with the dashboard, wiring, antenna equipment, speaker locations, and any later installation work.

== Speaker equipment ==

'''U66''' identifies the four-speaker system.

Fiero speaker arrangements may include front dash speakers and rear speakers depending on year and interior configuration. Speaker size, location, wiring, and trim details should be verified before ordering parts or modifying the audio system.

Related topics:

* [[Interior]]
* [[Factory radio]]

== ETR radios ==

Several Fiero audio codes describe ETR radios.

'''ETR''' generally refers to electronically tuned radio equipment. Depending on the code and model year, the radio may include features such as:

* AM/FM stereo
* Cassette
* Clock
* Seek/scan
* Auto-reverse cassette
* Equalizer
* Touch controls

Because GM used many similar radio faces and feature combinations, identify the actual installed radio before ordering repair parts or replacement parts.

== Audio code versus installed equipment ==

The audio RPO code identifies how the car was originally built.

It does not prove that the current radio or speakers are original.

Many Fieros have had audio changes such as:

* Aftermarket radio installation
* Factory radio swap
* Speaker replacement
* Subwoofer removal
* Performance Sound wiring changes
* Amplifier changes
* Antenna replacement
* Cut or modified wiring harness
* Bluetooth or auxiliary-input modification
* Console or dashboard changes

When documenting a car or diagnosing audio problems, compare the Service Parts Identification label with the actual installed equipment.

== Model-year differences ==

Factory audio availability changed during Fiero production.

Some radio codes are listed for specific model years, while others may appear across multiple years. The radio faceplate, connectors, speaker wiring, and available options may vary by year and equipment.

When identifying factory audio equipment, verify:

* Model year
* Audio RPO code
* Radio faceplate and controls
* Cassette or non-cassette equipment
* Equalizer equipment
* Speaker arrangement
* Performance Sound equipment, if present
* Wiring harness condition
* Antenna equipment
* Previous-owner modifications

== Common mistakes ==

Common mistakes when using audio RPO codes include:

* Assuming the current radio is original
* Confusing radio code with speaker-system code
* Assuming all cassette radios are the same
* Assuming all equalizer radios are the same
* Assuming a car has Performance Sound because it has an aftermarket subwoofer
* Assuming UQ6 equipment is still complete
* Ignoring cut or modified radio wiring
* Ordering parts based only on model year
* Confusing similar-looking factory radios from other GM vehicles

== Service notes ==

When using audio RPO codes:

* Photograph the Service Parts Identification label before it fades further.
* Record the audio code exactly.
* Verify model-year applicability.
* Inspect the actual installed radio.
* Inspect speaker locations and wiring.
* Check for Performance Sound equipment if UQ6 is present.
* Do not assume the current audio system matches the original RPO label.
* Be cautious with cars that have aftermarket audio wiring.
* Avoid cutting original harnesses when installing replacement radios.

== Notes ==

Audio RPO codes are factory build references. They help identify the original audio equipment assigned to a Fiero, but they do not necessarily describe the equipment currently installed.

Because audio systems are commonly modified, physical inspection is important when documenting originality or diagnosing audio problems.

== See also ==

* [[RPO codes]]
* [[Fiero RPO code list]]
* [[Service parts identification label]]
* [[Factory radio]]
* [[Performance Sound]]
* [[Audio upgrades]]
* [[Interior]]
* [[Electrical system]]

[[Category:Fieropedia]]
[[Category:Reference]]
[[Category:RPO codes]]
[[Category:Interior]]
[[Category:Electrical system]]

Audio RPO codes - Revision history