4SD ✓ Factory-verified

GMC · Regular Production Option

Trim group, Acadia Elevation, all-wheel drive

Years 2025–27 Models 2 Factory citations 7

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Also described as Trim group, AT4, max range

Documented applications

Acadia — Third generation (2024–2027) →

• 2025–2027 ✓ Factory-verified

  Elevation AWD: S; GM fleet model TLD56; shown in the trim headings of the guides; NICB prints the series as Elevation AWD (2026)

  ⛭ GM factory document — 2025 gmc acadia fleet order guide, p.1.

  ⛭ GM factory document — 2026 gmc acadia fleet order guide, p.1.

  ⛭ GM factory document — 2027 gmc acadia fleet order guide, p.1.

Sierra EV — BT1 (2024–2027) →

• 2026–2027 ✓ Factory-verified

  AT4

  ⛭ GM factory document — 2026 gmc sierra ev fleet order guide, p.1.

  ⛭ GM factory document — 2026 gmc sierra ev fleet order guide, p.47.

  ⛭ GM factory document — 2027 gmc sierra ev fleet order guide, p.1.

  ⛭ GM factory document — 2027 gmc sierra ev fleet order guide, p.46.

This page aggregates every documented appearance of 4SD in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.