Independent · Source-led · American performance history Issue 01 · 1951–2023
American Muscle Car Facts

Showroom arguments.
Race-bred answers.

General Motors option code

U1S  — 12-Disk CD Changer

U1S (12-Disk CD Changer): a General Motors factory option code recorded on 2 models across 1995–2002, with installs and price where a source states them.

2 models · 8 model years · 8 sources

Red 1995 Firebird with a dark nose stripe and T-tops, front three-quarter at a car show, a spectator at the open hatch of the car behind
1995 Pontiac Firebird in red with a black hood stripe Photo: Bull-Doser, public domain, via Wikimedia Commons

Every sourced appearance

Year Model As named that year Price Installs
1995 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 2,884 Reported
1996 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 2,885 Reported
1997 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 2,671 Reported
1997 Pontiac Grand Prix Delco 12-disc CD changer, trunk mounted (requires UK3) RPO Unknown Unknown
1998 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 2,669 Reported
1999 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 4,308 Reported
2000 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 3,510 Reported
2001 Pontiac Firebird and Trans Am 12-Disk CD Changer RPO Unknown 2,228 Reported
2002 Pontiac Firebird and Trans Am 12-disc CD changer RPO Unknown 5,934 Reported

Every row traces to the source it links from on that model's own year page; this table only collects them in one place.