UM8 ✓ Factory-verified

Buick · Regular Production Option

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

Years 2004–07 Models 2 Factory citations 5

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Also documented for CadillacChevroletGMCHummerOldsmobilePontiac

Documented applications

Rainier — GMT360 (2004–2007) →

• 2004–2007 ✓ Factory-verified

  the 2004 list prints "ETR Navigation Clock" without commas

  ⛭ GM factory document — 2004 buick rainier 2wd rpo code list, p.1.

  ⛭ GM factory document — 2007 buick rainier rpo code list, p.1.

Rendezvous — U-body / GMT257 (2002–2007) →

• 2004–2007 ✓ Factory-verified

  Wikipedia: a DVD-based navigation radio is available on the CXL.

  ⛭ GM factory document — 2004 buick rendezvous awd rpo code list, p.1.

  ⛭ GM factory document — 2006 buick rendezvous awd rpo code list, p.1.

  ⛭ GM factory document — 2007 buick rendezvous fwd rpo code list, p.1.

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