SDI ✓ Factory-verified

GMC · Regular Production Option

LPO, reflective triangle

Years 2015–18, 2022–26 Models 1 Factory citations 4

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Also documented for Chevrolet

Documented applications

Savana — GMT610 (2003–2027) →

• 2015–2018, 2022–2026 ✓ Factory-verified

  GM's list calls it an accessory

  ⛭ GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.15.

  ⛭ GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.16.

  ⛭ GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.14.

  ⛭ GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.12.

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