RGK ✓ Factory-verified

GMC · Regular Production Option

LPO, AT4 Black Appearance Package

Years 2025–27 Models 2 Factory citations 6

Query this via API →

Also documented for Chevrolet

Documented applications

Yukon — T1XX (2021–2027) →

• 2025–2027 ✓ Factory-verified

  2027: AT4, AT4 Ultimate: O; includes R88, RIK; the 2025 guide reads AT4 Appearance Package

  ⛭ GM factory document — 2025 gmc new yukon denali fleet order guide, p.30.

  ⛭ GM factory document — 2026 gmc yukon denali fleet order guide, p.31.

  ⛭ GM factory document — 2027 gmc yukon fleet order guide, p.27.

Yukon XL — T1XX (2021–2027) →

• 2025–2027 ✓ Factory-verified

  2027: AT4, AT4 Ultimate: O; includes R88, RIK; the 2025 guide reads AT4 Appearance Package

  ⛭ GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.31.

  ⛭ GM factory document — 2026 gmc yukon xl denali fleet order guide, p.31.

  ⛭ GM factory document — 2027 gmc yukon xl fleet order guide, p.28.

Related codes · mentioned in these notes

R88RIK

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