Rear seats, heated, rear outboard passenger cushion

Years 2025–27 Models 2 Factory citations 6

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Also described as Seats, heated, second row outboard, cushion only

Also documented for Chevrolet

Documented applications

Sierra EV — BT1 (2024–2027)

2025–2027 Factory-verified

2026 and 2027: included with and only available with ZM9; 2025: S in 5SC, 5SD; 2026: S in 4SC, 4SD, 5SB, 5SC, 5SD; A in 3SC; not offered in 3SB; 2027: S in 4SC, 4SD, 5SC, 5SD; A in 3SC; not offered in 3SB

GM factory document — 2025 gmc sierra ev denali fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra ev denali fleet order guide, p.4.
GM factory document — 2027 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra ev fleet order guide, p.7.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation 3VL: not offered; Elevation 3SB: O; AT4, AT4X, Denali, Denali Ultimate: included in the trim group

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.17.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

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