Delco Radio Service Manuals (listing starts with year... 1984 etc.)
Place also has some Delco radio parts and new faceplates.

You'd have to look at the cover page of the Manuals for applications and radio Part Number you have - Pontiac P is Fiero
http://elliottscarradio.com...ll-kinds.html?page=6

Service Manual for the radio/cassette in FIRST post of this thread would be for UX1 Part Number 16050352
http://elliottscarradio.com...e-manual-p17419.html

See Radio RPO codes on fender decal and reference that to Pontiac part number.



From P22 Parts Book

1984 (radios had black faceplate and knobs)
Part number, description and RPO code
16033472 Receiver, radio w/Mono UL6
16033592 Receiver, radio w/Mono U63
16030042 Receiver, radio w/Stereo UL1
16030052 Receiver, radio w/Stereo UU7
16032452 Receiver, radio w/Stereo UU6
16034222 Receiver, radio w/Stereo UU9

1985
Part number, description and RPO code
16035102 Receiver, radio w/Stereo UX1
16035122 Receiver, radio w/Stereo UL1 (except Seek/Scan)
16036912 Receiver, radio w/Stereo UT4
16040862 Receiver, radio w/Stereo UM6
16048312 Receiver, radio w/Stereo UM7 with Seek/Scan

1986-88
Part number, description and RPO code
16048312 Receiver, radio w/Stereo UM7 with Seek/Scan
16050352 Receiver, radio w/Stereo UX1
16050362 Receiver, radio w/Stereo UT4
16040862 Receiver, radio w/Stereo UM6

16041072 Speaker, front, 5-1/4" 4-ohm round subwoofer UQ6
16040752 Amplifier, low freq audio - comes with UQ6 option

This is the Service Manual for the Subwoofer Amplifier PN 16040752
http://elliottscarradio.com...-service-manual.html

[This message has been edited by fierosound (edited 09-26-2020).]