5J1 ✓ Factory-verified

Chevrolet · Regular Production Option

Calibration, keyless remote panic button and exterior lights/horn disable (SEO)

Years 2025–27 Models 4 Factory citations 9

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Also described as Calibration, keyless remote panic button disables exterior lights and horn

Documented applications

Blazer EV (2024–2027) →

• 2025–2027 ✓ Factory-verified internal

  ; only in: Police Package

  ⛭ GM factory document — 2025 chevrolet blazer ev police package fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 chevrolet blazer ev police package fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 chevrolet blazer ev police package fleet order guide rpo codes, p.1.

Silverado 1500 — Fifth generation (2027) →

• 2027 ✓ Factory-verified internal
  ⛭ GM factory document — 2027 chevrolet next generation silverado 1500 retail and fleet fleet order guide rpo codes, p.1.

Silverado — T1XX (2019–2026) →

• 2025–2026 ✓ Factory-verified internal
  ⛭ 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.

Tahoe — T1XX (2021–2027) →

• 2025–2027 ✓ Factory-verified internal

  2027: police guides: O on both columns

  ⛭ GM factory document — 2025 chevrolet new tahoe police package and special service fleet order guide, p.9.

  ⛭ GM factory document — 2026 chevrolet tahoe police package and special service fleet order guide, p.9.

  ⛭ GM factory document — 2027 chevrolet tahoe police package and special service fleet order guide, p.9.

This page aggregates every documented appearance of 5J1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.