J77 ✓ Factory-verified

GMC · Regular Production Option

Brake, electronic parking

Years 2025–26 Models 2 Factory citations 4

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Also documented for BuickCadillacChevrolet

Documented applications

Hummer EV Pickup (2022–2027) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 gmc hummer ev pickup fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc hummer ev pickup fleet order guide rpo codes, p.1.

Hummer EV SUV — BT1 (2024–2027) →

• 2025–2026 ✓ Factory-verified
  ⛭ GM factory document — 2025 gmc hummer ev suv fleet order guide, p.6.

  ⛭ GM factory document — 2026 gmc hummer ev suv fleet order guide, p.6.

This page aggregates every documented appearance of J77 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.