T84 ✓ Factory-verified

Buick · Regular Production Option

Headlamps, right-hand rule of the road, E mark

Years 2002, 2004–07 Models 3 Factory citations 4

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Also documented for CadillacChevroletGMCHummerOldsmobilePontiac

Documented applications

Century — W-body (1997–2005) →

• 2002 ✓ Factory-verified
  ⛭ GM factory document — 2002 buick century rpo code list, p.1.

Rainier — GMT360 (2004–2007) →

• 2004–2007 ✓ Factory-verified

  the 2004 lists word it as "headlamps, right rule of the road, E mark"

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

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

Regal — W-body (1997–2004) →

• 2002 ✓ Factory-verified
  ⛭ GM factory document — 2002 buick regal rpo code list, p.1.

This page aggregates every documented appearance of T84 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.