VG4 ✓ Factory-verified

Buick · Regular Production Option

Protector, undervehicle compound, corrosion preventive, water based, black

Years 1998–00, 2004, 2007–09 Models 6 Factory citations 11

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Also described as Protector, under vehicle compound, corrosion preventive, water based, black

Also documented for CadillacChevroletGMCOldsmobilePontiacSaturn

Documented applications

Century — W-body (1997–2005) →

• 1998–2000 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 buick century rpo code list, p.1.

  ⛭ GM factory document — 1999 buick century rpo code list, p.1.

  ⛭ GM factory document — 2000 buick century rpo code list, p.1.

Enclave — Lambda / GMT967 (2008–2017) →

• 2008–2009 ✓ Factory-verified internal
  ⛭ 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 ✓ Factory-verified internal
  ⛭ GM factory document — 2004 buick rainier 2wd rpo code list, p.1.

Regal — W-body (1997–2004) →

• 1998–2000 ✓ Factory-verified internal
  ⛭ GM factory document — 1998 buick regal rpo code list, p.1.

  ⛭ GM factory document — 1999 buick regal rpo code list, p.1.

  ⛭ GM factory document — 2000 buick regal rpo code list, p.1.

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

• 2007 ✓ Factory-verified internal
  ⛭ GM factory document — 2007 buick rendezvous fwd rpo code list, p.1.

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

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

This page aggregates every documented appearance of VG4 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.