Key equipment, two additional key fobs

Years 2015, 2017–20, 2023, 2025–27 Models 12 Factory citations 41

Also described as Key system, 2 additional key fobsKey equipment, two additional keys for single key systemKey systemKey system, 2 spare keysKey system, 2 key fobs

Also documented for Buick GMC

Documented applications

BrightDrop (2022–2026)

2025–2026 Factory-verified

S;

GM factory document — 2025 chevrolet brightdrop 400 and brightdrop 600 fleet order guide, p.2.
GM factory document — 2026 chevrolet brightdrop 400 and brightdrop 600 fleet order guide, p.2.

Colorado — Third generation (2023–2027)

2025–2027 Factory-verified

special equipment option (SEO); gives four fobs in all; programming is at the customer's expense; WT: O; LT, Trail Boss, Z71, ZR2: not offered

GM factory document — 2025 chevrolet colorado fleet order guide, p.55.
GM factory document — 2026 chevrolet colorado fleet order guide, p.62.
GM factory document — 2027 chevrolet colorado fleet order guide, p.60.

Express — GMT610 (2003–2027)

2023, 2025–2027 Factory-verified

O: Cargo 1WT, Cutaway 1WT, Cutaway 2WT (2025–2026), Passenger 1LS, Passenger 1LT

GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.12.
GM factory document — 2025 chevrolet express cargo fleet order guide, p.37.
GM factory document — 2025 chevrolet express cutaway fleet order guide, p.51.
GM factory document — 2025 chevrolet express passenger fleet order guide, p.29.
GM factory document — 2026 chevrolet express cargo fleet order guide, p.39.
GM factory document — 2026 chevrolet express cutaway fleet order guide, p.53.
GM factory document — 2026 chevrolet express passenger fleet order guide, p.31.
GM factory document — 2027 chevrolet express cargo fleet order guide, p.37.
GM factory document — 2027 chevrolet express cutaway fleet order guide, p.27.
GM factory document — 2027 chevrolet express passenger fleet order guide, p.29.

Silverado EV — BT1 (2024–2027)

2026–2027 Factory-verified

adds two spare key fobs for four in total; 2026: A in 4WT, 5WT, 8WT; not offered in 2LT, 3LT, 4LT, 2TR, 3TR, 2SP, 3SP; 2027: A in 4WT, 5WT, 8WT; not offered in 2LT, 3LT, 2TR, 3TR

GM factory document — 2026 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado ev fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado ev fleet order guide, p.64.
GM factory document — 2027 chevrolet silverado ev fleet order guide, p.53.

Silverado HD (T1XX, 2020–2027)

2025–2027 Factory-verified

only in: 2500 HD, 3500 HD

GM factory document — 2025 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2025 chevrolet silverado 3500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 3500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado 2500 hd retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2027 chevrolet silverado 3500 hd retail and fleet fleet order guide rpo codes, p.1.

Silverado — K2XX (2014–2019)

2015 Factory-verified

GM factory document — 2015 chevrolet silverado 1500 fleet order guide wayback, p.1.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

the Silverado HD (T1XX) doc reads this code "Key equipment, two additional key fobs"

GM factory document — 2025 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 4500 hd 5500 hd and 6500 hd fleet order guide rpo codes, p.1.

Silverado — T1XX (2019–2026)

2020, 2025–2026 Factory-verified

the 2020 list reads "two additional keys for single key system";

GM factory document — 2020 chevrolet silverado 1500 fleet order guide wayback, p.1.
GM factory document — 2025 chevrolet silverado 1500 retail and fleet fleet order guide rpo codes, p.1.
GM factory document — 2026 chevrolet silverado 1500 retail and fleet fleet order guide rpo codes, p.1.

Sonic — first generation (2012–2020)

2017–2019 Factory-verified

LT: O; Premier: S; in PDB on the LT

GM factory document — 2017 chevrolet sonic order guide copy gm authority, p.62.
GM factory document — 2018 chevrolet sonic order guide copy gm authority, p.68.
GM factory document — 2019 chevrolet sonic order guide may 4 2018 copy gm authority, p.61.

Trailblazer — First generation, VSS-F (2021–2027)

2025–2027 Factory-verified

all trims: S

GM factory document — 2025 chevrolet trailblazer fleet order guide, p.2.
GM factory document — 2026 chevrolet trailblazer fleet order guide, p.2.
GM factory document — 2027 chevrolet trailblazer limited fleet order guide, p.3.

Trax — first US generation (2015–2022)

2018–2019 Factory-verified

LT: O, only in PDB; Premier: S

GM factory document — 2018 chevrolet trax order guide copy gm authority, p.16.
GM factory document — 2019 chevrolet trax order guide copy gm authority, p.15.

Trax — Second generation, VSS-F (2024–2026)

2025–2026 Factory-verified

LT, 2RS, ACTIV: S

GM factory document — 2025 chevrolet trax fleet order guide, p.3.
GM factory document — 2026 chevrolet trax fleet order guide, p.3.

This page aggregates every documented appearance of 5H1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.