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

Showroom arguments.
Race-bred answers.

General Motors option code

GU2  — 2.73 Axle

GU2 (2.73 Axle): a General Motors factory option code recorded on 1 model across 1993–2002, with installs and price where a source states them.

1 model · 10 model years · 10 sources

Black fourth-generation Firebird with its pointed nose and pop-up headlamps, front three-quarter in a parking lot
Shown: 1993–1997 Pontiac Firebird in black Photo: Bull-Doser, public domain, via Wikimedia Commons

Every sourced appearance

Year Model As named that year Price Installs
1993 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 1,100 Reported
1994 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 9,319 Reported
1995 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 8,594 Reported
1996 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 1,750 Reported
1997 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 2,817 Reported
1998 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 5,377 Reported
1999 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 2,568 Reported
2000 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 2,895 Reported
2001 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 1,208 Reported
2002 Pontiac Firebird and Trans Am 2.73 Axle RPO Unknown 1,151 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.