LPO, audio system by Kicker

Years 2023–27 Models 6 Factory citations 23

Also described as LPO, MultiPro tailgate audio system by Kicker, dealer-installedLPO, MultiPro tailgate audio system by KickerLPO, MultiPro Tailgate Audio System by Kicker

Also documented for Chevrolet

Documented applications

Canyon — Third generation (VSS-T) (2023–2027)

2023–2027 Factory-verified

GM factory document — 2023 gmc 23canyon electrical body builder 2023march13, p.12.
GM factory document — 2024 gmc 24 canyon electrical body builder manual 2023oct04, p.13.
GM factory document — 2025 gmc canyon fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc canyon fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc canyon fleet order guide rpo codes, p.1.

Hummer EV Pickup (2022–2027)

2024–2026 Factory-verified

the 2026 list prints "LPO, MultiPro Tailgate Audio System by Kicker"; 2024: Omega Edition content, GM Authority 2024 changes page

GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.

Sierra EV — BT1 (2024–2027)

2026–2027 Factory-verified

GM factory document — 2026 gmc sierra ev fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra ev fleet order guide, p.20.
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.19.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation 3VL: not offered; Elevation 3SB, AT4, Denali: O (ADI available); AT4X, Denali Ultimate: included in the trim group; dealer-installed

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.21.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

only in: 2500 HD and 3500 HD pickup; AT4X, Denali Ultimate: S; SLE, SLT, AT4, Denali: O; Pro: not offered

GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide, p.9.
GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide, p.8.
GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide, p.7.

Sierra — T1XX (2019–2026)

2023, 2025–2026 Factory-verified

the upfitter lists read "Accessory, speaker kit, level 1"

GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.13.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.14.
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 SAX in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.