U73 Factory-verified

Chevrolet · Regular Production Option

Antenna, fixed, radio

Years 1963–87, 1998–10, 2014–18, 2022–26 Models 24 Factory citations 111

Also described as Manual rear antennaManual Rear AntennaStandard AntennaManual antenna-rearAntenna, fixed mastFixed mast antennaAntenna, radio, fixedAntenna, fixed

Also documented for Buick GMC Oldsmobile Pontiac

Documented applications

Camaro

1967–1969 Factory-verified

AM only

GM Heritage factory kit — 1967 Chevrolet Camaro, p.51.
GM Heritage factory kit — 1969 Chevrolet Camaro, p.46.

Chevelle / El Camino

1965–1969 Factory-verified

GM Heritage factory kit — 1965 Chevrolet Chevelle, p.9.
GM Heritage factory kit — 1969 Chevrolet Chevelle, p.13.

Corvette (C3)

1977 Single-source

price/qty NA

Impala / Full-Size

1963, 1964- Confirmed

Nova / Chevy II

1965–1967 Factory-verified

GM Heritage factory kit — 1965 Chevrolet Nova, p.4.
GM Heritage factory kit — 1967 Chevrolet Nova, p.8.

Astro — Second generation (1995–2005)

1998–2005 Factory-verified

GM factory document — 1998 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 1999 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2002 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet astro 2wd rpo code list, p.1.

Blazer — S-10 second generation (1995–2005)

1998–2005 Factory-verified

The 2000 list is shifted by one line here (it prints U73 as the speedometer, which GM's other lists give U19); the 1998–1999 lists read fixed mast

GM factory document — 1998 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2005 chevrolet blazer 4wd rpo code list, p.1.

Camaro — Gen 3 (1982–1992)

1982–1985 Factory-verified

GM Heritage factory kit — 1982 Chevrolet Camaro, p.30.
GM Heritage factory kit — 1983 Chevrolet Camaro, p.37.
GM Heritage factory kit — 1984 Chevrolet Camaro, p.4.
GM Heritage factory kit — 1985 Chevrolet Camaro, p.22.

Camaro — Gen 4 (1993–2002)

1998–2002 Factory-verified

GM factory document — 1998 chevrolet camaro rpo code list, p.1.
GM factory document — 1999 chevrolet camaro rpo code list, p.1.
GM factory document — 2000 chevrolet camaro rpo code list, p.1.
GM factory document — 2001 chevrolet camaro rpo code list, p.1.
GM factory document — 2002 chevrolet camaro rpo code list, p.1.

Cavalier — first generation (1982–1987)

1984–1987 Factory-verified

optional on the base Cavalier, standard on the others

GM Heritage factory kit — 1984 Chevrolet Cavalier, p.9.
GM Heritage factory kit — 1985 Chevrolet Cavalier, p.38.
GM Heritage factory kit — 1986 Chevrolet Cavalier, p.38.
GM Heritage factory kit — 1987 Chevrolet Cavalier, p.38.

City Express (2015–2018)

2015–2018 Factory-verified

2018 guide: 1LS, 1LT: S

GM factory document — 2015 chevrolet city express electrical body builders manual service manual 2015 en us, p.9.
GM factory document — 2017 chevrolet city express electrical body builders manual service manual 2017 en us, p.9.
GM factory document — 2018 chevrolet 18 city express bodybuilders sm 2 w cvr pg, p.10.
GM factory document — 2018 chevrolet city express order guide copy gm authority, p.10, p.22.

Corvette — C5 (1997–2004)

1999–2004 Factory-verified

GM factory document — 1999 chevrolet corvette rpo code list, p.1.
GM factory document — 2000 chevrolet corvette rpo code list, p.1.
GM factory document — 2001 chevrolet corvette rpo code list, p.1.
GM factory document — 2002 chevrolet corvette rpo code list, p.1.
GM factory document — 2003 chevrolet corvette rpo code list, p.1.
GM factory document — 2004 chevrolet corvette rpo code list, p.1.

El Camino — fifth generation (1983–1987)

1983–1985, 1987 Factory-verified

Included with a radio; the 1986 order guide prints the antenna without its code

GM Heritage factory kit — 1983 Chevrolet El Camino, p.6.
GM Heritage factory kit — 1984 Chevrolet El Camino, p.6.
GM Heritage factory kit — 1985 Chevrolet El Camino, p.12.
GM Heritage factory kit — 1987 Chevrolet El Camino, p.41.

Express — GMT600 (1996–2002)

1998–2002 Factory-verified

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.
GM factory document — 2001 chevrolet express rpo code list, p.1.
GM factory document — 2002 chevrolet express rpo code list, p.1.

Express — GMT610 (2003–2027)

2003–2010, 2014–2018, 2022–2026 Factory-verified

GM factory document — 2003 chevrolet express rpo code list, p.1.
GM factory document — 2004 chevrolet express awd rpo code list, p.1.
GM factory document — 2005 chevrolet express awd rpo code list, p.1.
GM factory document — 2006 chevrolet express awd rpo code list, p.1.
GM factory document — 2007 chevrolet express awd rpo code list, p.1.
GM factory document — 2008 chevrolet express rpo code list, p.1.
GM factory document — 2009 chevrolet express rpo code list, p.1.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.16.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.7.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.16.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.10.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.10.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.16.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.14.
GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.15.
GM factory document — 2024 chevrolet 24 express savana body builder manual 18553161 2023oct26, p.14.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.12.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.12.

Malibu — fourth generation, A-body (1983)

1983 Factory-verified

included with U63, U69, U58 and UN3

GM Heritage factory kit — 1983 Chevrolet Malibu, p.21.
GM Heritage factory kit — 1983 Chevrolet Malibu, p.23.

Malibu — Sixth generation, Epsilon (2004–2008)

2004–2007 Factory-verified

shared Epsilon code (Pontiac G6).

GM factory document — 2004 chevrolet malibu rpo code list, p.1.
GM factory document — 2005 chevrolet malibu rpo code list, p.1.
GM factory document — 2006 chevrolet malibu rpo code list, p.1.
GM factory document — 2007 chevrolet malibu rpo code list, p.1.
GM Heritage factory kit — 2004 Chevrolet Malibu, p.38.

Monte Carlo — fourth generation (1983–1988)

1983–1984 Factory-verified

included with the radio, except on the SS, which has the black US6 antenna

GM Heritage factory kit — 1983 Chevrolet Monte Carlo, p.30.
GM Heritage factory kit — 1984 Chevrolet Monte Carlo, p.36.

S-10 pickup — Second generation (1994–2004)

1998–2004 Factory-verified

The 2000 list is shifted by one line here (it prints U73 as the speedometer, which GM's other lists give U19); the 1998–1999 lists read fixed mast. The 2002–2004 lists read as the 2001 list.

GM factory document — 1998 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 1999 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2000 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2001 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2002 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.

Silverado HD (T1XX, 2020–2027)

2023 Factory-verified

only in: 2500 HD, 3500 HD, 3500 HD chassis cab for 2023 (the 2500 HD and 3500 HD Upfitter list)

GM factory document — 2023 chevrolet 23silverado 2500 3500hd electrical body builder sm en us 2022oct12, p.13.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

SSR (2003–2006)

2003–2006 Factory-verified

the kit guides describe an antenna built into the windshield

GM Heritage factory kit — 2003 And 2004 Chevrolet SSR, p.87.
GM factory document — 2003 chevrolet ssr rpo code list, p.1.
GM factory document — 2004 chevrolet ssr rpo code list, p.1.
GM factory document — 2005 chevrolet ssr rpo code list, p.1.
GM factory document — 2006 chevrolet ssr rpo code list, p.1.

Tracker — Second generation (1999–2004)

1999–2004 Factory-verified

GM factory document — 1999 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2000 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2001 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2002 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet tracker 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tracker 2wd rpo code list, p.1.

TrailBlazer — GMT360 (2002–2009)

2002–2009 Factory-verified

GM Heritage factory kit — 2002 Chevrolet Trailblazer, p.28.
GM factory document — 2002 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet trailblazer 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet trailblazer 2wd rpo code list, p.1.

This page aggregates every documented appearance of U73 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.