Radio, AM/FM stereo, seek/scan, CD, ETR, navigation, clock

Years 2003–09 Models 4 Factory citations 26

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Also described as Radio, AM/FM stereo, seek/scan, CD, ETR navigation clock

Also documented for Buick Cadillac GMC Hummer Oldsmobile Pontiac

Documented applications

Avalanche — GMT800 (2002–2006)

2003–2006 Factory-verified

GM factory document — 2003 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet avalanche 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet avalanche 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Avalanche, p.37.
GM Heritage factory kit — 2004 Chevrolet Avalanche, p.36.
GM Heritage factory kit — 2005 Chevrolet Avalanche, p.35.

Suburban — GMT800 (2000–2006)

2003–2006 Factory-verified

GM factory document — 2003 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet chevy suburban 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet chevy suburban 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Suburban, p.39.
GM Heritage factory kit — 2005 Chevrolet Suburban, p.146.

Tahoe — GMT800 (2000–2006)

2003–2006 Factory-verified

GM factory document — 2003 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet tahoe 2wd rpo code list, p.1.
GM factory document — 2006 chevrolet tahoe 2wd rpo code list, p.1.
GM Heritage factory kit — 2003 Chevrolet Tahoe, p.32.
GM Heritage factory kit — 2005 Chevrolet Tahoe, p.122.
GM Heritage factory kit — 2006 Chevrolet Tahoe, p.29.

TrailBlazer — GMT360 (2002–2009)

2004–2009 Factory-verified

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 UM8 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.