NAA ✓ Factory-verified

GMC · Regular Production Option

LPO, rocker protection

Years 2023–26 Models 1 Factory citations 5

Query this via API →

Also documented for Chevrolet

Documented applications

Sierra — T1XX (2019–2026) →

• 2023–2026 ✓ Factory-verified

  dealer-installed; the upfitter lists read "Accessory, rocker guard, tubular"

  ⛭ GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.12.

  ⛭ GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.14.

  ⛭ GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.12.

  ⛭ 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 NAA in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.