Antenna, fixed, radio

Years 1983–85, 1987, 1998–10, 2014–20, 2022–26 Models 8 Factory citations 47

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Also described as Antenna, fixed mast

Also documented for Buick Chevrolet Oldsmobile Pontiac

Documented applications

Caballero — G-body (1983–1987)

1983–1985, 1987 Factory-verified

Included with a radio; the 1986 order guide prints the antenna without its code; shared G-body platform code; cited from the joint El Camino/Caballero pages of the Chevrolet El Camino kits

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.

Envoy — GMT360 (2002–2009)

2002–2009 Factory-verified

GM factory document — 2002 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2005 gmc envoy 2wd rpo code list, p.1.
GM factory document — 2009 gmc envoy 4wd rpo code list, p.1.

Jimmy — second generation (1995–2001)

1998–2001 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 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2001 gmc jimmy 4wd rpo code list, p.1.

Safari — Second generation (1995–2005)

1998–2005 Factory-verified

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

Savana — GMT600 (1996–2002)

1998–2002 Factory-verified

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

Savana — GMT610 (2003–2027)

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

GM factory document — 2003 gmc savana rpo code list, p.1.
GM factory document — 2008 gmc savana rpo code list, p.1.
GM factory document — 2008 chevrolet ld electricalfullsizevans, p.18.
GM factory document — 2009 gmc savana rpo code list, p.1.
GM factory document — 2009 chevrolet ld electricalfullsizevans 100813, p.16.
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 — 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 — 2026 chevrolet my26 express savana electrical bbm, p.12.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2025 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.13.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.14.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.14.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.14.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.16.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.14.

Sonoma — 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 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2001 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2002 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2003 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2004 gmc sonoma pickup 4wd rpo code list, p.1.

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