Radio equipment, suppression

Years 1970–82, 2001–03, 2006–09, 2014, 2016, 2025–27 Models 11 Factory citations 32

Also described as Radio suppression equipmentSuppression, radio, braided brass straps to body locationsRadio suppression package, with ground straps (SEO)

Also documented for Cadillac GMC

Documented applications

Camaro

1970s Single-source

C/K Trucks

1973–82 Single-source

—

Avalanche — GMT900 (2007–2013)

2007–2009 Factory-verified

GM factory document — 2007 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet avalanche 2wd rpo code list, p.1.

Impala — eighth generation (2000–2005)

2001–2003 Factory-verified

the 2001 list prints "Equjpment".

GM factory document — 2001 chevrolet impala rpo code list, p.1.
GM factory document — 2002 chevrolet impala rpo code list, p.1.
GM factory document — 2003 chevrolet impala rpo code list, p.1.
GM Heritage factory kit — 2001 Chevrolet Impala, p.34.

Impala — ninth generation (2006–2016)

2006–2009 Factory-verified

GM factory document — 2006 chevrolet impala rpo code list, p.1.
GM factory document — 2007 chevrolet impala rpo code list, p.1.
GM factory document — 2008 chevrolet impala rpo code list, p.1.
GM factory document — 2009 chevrolet impala rpo code list, p.1.

Monte Carlo — sixth generation (2000–2007)

2001–2003, 2006–2007 Factory-verified

The 2001 list misprints "Equjpment".

GM factory document — 2001 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2002 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2003 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2006 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2007 chevrolet monte carlo rpo code list, p.1.

Suburban — GMT900 (2007–2014)

2007–2009 Factory-verified

GM factory document — 2007 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2007 Chevrolet Suburban, p.35.

Tahoe — GMT800 (2000–2006)

2006 Factory-verified

The 2006 Tahoe Police Vehicle order-guide pages print it as "Radio suppression, braided brass straps attaching to various body locations"

GM Heritage factory kit — 2006 Chevrolet Tahoe, p.152.

Tahoe — GMT900 (2007–2014)

2007–2009, 2014 Factory-verified

GM factory document — 2007 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2008 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2009 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2014 chevrolet tahoe police vehicle fleet order guide wayback, p.3.
GM factory document — 2014 chevrolet tahoe special service vehicle fleet order guide wayback, p.3.
GM Heritage factory kit — 2007 Chevrolet Tahoe, p.30, p.180.

Tahoe — K2XX (2015–2020)

2016 Factory-verified

2016: Police Vehicle, Special Service

GM factory document — 2016 chevrolet tahoe police vehicle fleet order guide wayback, p.4.
GM factory document — 2016 chevrolet tahoe special service vehicle fleet order guide wayback, p.4.

Tahoe — T1XX (2021–2027)

2025–2027 Factory-verified

2027: police guides: O on both columns; only in: Police Package and Special Service models

GM factory document — 2025 chevrolet new tahoe police package and special service fleet order guide, p.13.
GM factory document — 2026 chevrolet tahoe police package and special service fleet order guide, p.13.
GM factory document — 2027 chevrolet tahoe police package and special service fleet order guide, p.13.

This page aggregates every documented appearance of UN9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.