1SA ✓ Factory-verified

Buick · Regular Production Option

Package, option 01

Years 2007–09 Models 2 Factory citations 3

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Also documented for CadillacChevroletGMCPontiacSaturn

Documented applications

Enclave — Lambda / GMT967 (2008–2017) →

• 2008–2009 ✓ Factory-verified

  generic wording in a list GM shared with other nameplates.

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

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

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

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

This page aggregates every documented appearance of 1SA in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.