WBC Factory-verified

GMC · Regular Production Option

LPO, cat-back performance exhaust

Years 2016–27 Models 6 Factory citations 28

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Also described as LPO, exhaust, dual modeLPO, cat-back performance exhaust, bright tipsLPO, Exhaust system, cat-back performance upgrade

Also documented for Cadillac Chevrolet

Documented applications

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

2016–2017, 2019, 2021–2022 Factory-verified

2016: Canyon, SLE, SLT: O; SL: not offered; requires LFX; new for 2016 in the 2016 guide, so the 2015 upfitter list is not cited; 2021 from the upfitter list GM files for 2021 and 2022

GM factory document — 2016 gmc canyon fleet order guide wayback, p.2.
GM factory document — 2017 chevrolet canyon colorado electrical body builders manual service manual 2017 en us, p.19.
GM factory document — 2019 chevrolet 19 coloradocanyon body builder sm u 2018aug01 1, p.13.
GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.14.

Sierra 1500 — Next-Generation (2027)

2027 Factory-verified

Pro, Elevation, AT4: not offered; AT4X, Denali, Denali Ultimate: O (ADI available); dealer-installed; requires the Crew Cab short box and the L78 engine; included with PDZ; not available with WCW

GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide, p.50.
GM factory document — 2027 gmc next generation sierra 1500 retail and fleet fleet order guide rpo codes, p.1.

Sierra — K2XX (2014–2019)

2016–2019 Factory-verified

new for 2016; part of the All Terrain X package (STF).

GM factory document — 2016 gmc sierra 1500 fleet order guide wayback, p.4.
GM factory document — 2017 chevrolet sierra silverado electrical body builders manual service manual 2017 en us, p.38.
GM factory document — 2018 gmc sierra 1500 order guide copy gm authority, p.92.
GM factory document — 2019 gmc sierra 1500 limited double cab k2xx order guide copy gm authority, p.42.

Sierra — T1XX (2019–2026)

2019–2020, 2022–2026 Factory-verified

the upfitter lists read "Accessory, exhaust upgrade"

GM factory document — 2019 gmc 19 sierra 1500 body builder feb 20, p.15.
GM factory document — 2020 gmc 20 sierra 1500 electrical body buil 1, p.16.
GM factory document — 2022 gmc 22 sierra 1500 new electrical body builder sm en us 2022jul20, p.15.
GM factory document — 2023 gmc 23 sierra 1500 electrical body builder sm en us 2022oct12, p.16.
GM factory document — 2024 gmc 24 sierra 1500 sm electrical body builder esid 23dec12, p.18.
GM factory document — 2025 gmc my25 sierra 1500 electrical bbm, p.16.
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.

Yukon — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: O on all trims

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.13.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.13.
GM factory document — 2025 gmc new yukon denali fleet order guide, p.39.
GM factory document — 2026 gmc yukon denali fleet order guide, p.40.
GM factory document — 2027 gmc yukon fleet order guide, p.36.

Yukon XL — T1XX (2021–2027)

2022–2023, 2025–2027 Factory-verified

2027: O on all trims

GM factory document — 2022 gmc 22 yukon yukon xl electrical body builder sm u 2021oct13, p.13.
GM factory document — 2023 gmc 23 yukon yukon xl electrical body builder sm en us 092822, p.13.
GM factory document — 2025 gmc new yukon xl denali fleet order guide, p.41.
GM factory document — 2026 gmc yukon xl denali fleet order guide, p.42.
GM factory document — 2027 gmc yukon xl fleet order guide, p.37.

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