UM8 ✓ Factory-verified

GMC · Regular Production Option

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

Years 2003–09 Models 2 Factory citations 7

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

Also documented for BuickCadillacChevroletHummerOldsmobilePontiac

Documented applications

Envoy — GMT360 (2002–2009) →

• 2004–2009 ✓ Factory-verified
  ⛭ GM factory document — 2004 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.

Yukon — GMT800 (2000–2006) →

• 2003–2006 ✓ Factory-verified
  ⛭ GM factory document — 2003 gmc yukon 2wd rpo code list, p.1.

  ⛭ GM factory document — 2004 gmc yukon 2wd rpo code list, p.1.

  ⛭ GM factory document — 2005 gmc yukon 2wd rpo code list, p.1.

  ⛭ GM factory document — 2006 gmc yukon 2wd rpo code list, p.1.

This page aggregates every documented appearance of UM8 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.