Bumper, rear, delete

Years 2015, 2018–20, 2022–27 Models 3 Factory citations 14

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Also documented for Chevrolet

Documented applications

Sierra HD — K2XX (2015–2019)

2015, 2018–2019 Factory-verified

comes with the pickup box delete (ZW9); 2015 marks: Sierra, SLE, SLT: O; 2018: GM's 2018 Sierra 2500HD order guide; 2019: named in the 2019 interior page's package contents or footnotes

GM factory document — 2015 gmc sierra 2500hd fleet order guide wayback, p.3.
GM factory document — 2019 gmc sierra 2500hd fleet order guide wayback, p.1.
GM factory document — 2018 gmc sierra 2500hd order guide copy gm authority, p.19.

Sierra HD — T1XX (2020–2027)

2025–2027 Factory-verified

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.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.9.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.10.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.10.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.9.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.11.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.9.
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 9J4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.