6M9 ✓ Factory-verified

GMC · Regular Production Option

Tire, spare, 265/70R17

Years 2019–20, 2025–26 Models 1 Factory citations 4

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Also documented for Chevrolet

Documented applications

Sierra — T1XX (2019–2026) →

• 2019–2020, 2025–2026 ✓ Factory-verified

  the 2019–2020 lists read "265/70R17 SL 115S BW AT (SEO)"

  ⛭ GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.9.

  ⛭ GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.10.

  ⛭ GM factory document — 2025 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

This page aggregates every documented appearance of 6M9 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.