U42 ✓ Factory-verified

Buick · Regular Production Option

Entertainment package, rear seat

Years 2004–09 Models 3 Factory citations 7

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Also documented for CadillacChevroletGMCHummerOldsmobilePontiacSaturn

Documented applications

Enclave — Lambda / GMT967 (2008–2017) →

• 2008–2009 ✓ Factory-verified

  the 2009 list adds single display, remote control, auxiliary jack and 2 wireless dual channel headphones.

  ⛭ GM factory document — 2008 buick enclave rpo code list, p.1.

  ⛭ GM factory document — 2009 buick enclave rpo code list, p.1.

Rainier — GMT360 (2004–2007) →

• 2004–2007 ✓ Factory-verified

  the 2004 lists word it as "package, entertainment, rear seat"

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

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

Terraza — U-body / GMT201 (2005–2007) →

• 2005–2007 ✓ Factory-verified
  ⛭ GM factory document — 2005 buick terraza rpo code list, p.1.

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

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

This page aggregates every documented appearance of U42 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.