LPO, cross rails tiered storage system

Years 2015–17, 2019–25 Models 2 Factory citations 11

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Also described as LPO, pickup bed tiered storage

Also documented for Chevrolet

Documented applications

Canyon — Second generation (GMT31XX) (2015–2022)

2015–2017, 2019, 2021–2022 Factory-verified

2015–2016: Canyon, SLE, SLT: O; SL: not offered; 2021 from the upfitter list GM files for 2021 and 2022

GM factory document — 2015 gmc canyon fleet order guide wayback, p.6.
GM factory document — 2016 gmc canyon fleet order guide wayback, p.6.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.16.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.12.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.12.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2025 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.13.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.14.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.14.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.14.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.16.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.14.

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