Wiring harness, accessory, for 9L7 wiring to junction block

Years 1993, 2025–26 Models 2 Factory citations 3

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Also described as Key system, dual key

Documented applications

Chevy Van — Second generation G-series (1983–1996)

1993 Factory-verified

SEO; G21005 only; one key for ignition and front doors, another for all cargo doors.

GM Heritage factory kit — 1993 Chevrolet G Van, p.67.

Silverado Medium Duty (GM515, 2019–2026)

2025–2026 Factory-verified

includes connector and blunt-cut wires

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.

This page aggregates every documented appearance of 9L9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.