1SD ✓ Factory-verified

GMC · Regular Production Option

Trim group, Hummer EV Pickup 3X

Years 2000, 2024–26 Models 2 Factory citations 3

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Also described as Package, option 04

Also documented for BuickCadillacChevroletPontiac

Documented applications

Hummer EV Pickup (2022–2027) →

• 2024–2026 ✓ Factory-verified

  3X; 2024: EV3X, GM Authority; 2025 guide trim headings show it under the 3X column

  ⛭ GM factory document — 2025 gmc hummer ev pickup fleet order guide, p.1.

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

Safari — Second generation (1995–2005) →

• 2000 ✓ Factory-verified
  ⛭ GM factory document — 2000 gmc safari 2wd rpo code list, p.1.

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