Z6A ✓ Factory-verified

GMC · Regular Production Option

Gooseneck / 5th wheel prep package

Years 2024–27 Models 1 Factory citations 6

Query this via API →

Also documented for Chevrolet

Documented applications

Sierra HD — T1XX (2020–2027) →

• 2024–2027 ✓ Factory-verified

  only in: 2500 HD and 3500 HD pickup; hitch platform with tray, stamped bed holes with removable caps and bed-mounted 7-pin trailer harness; 2024: GM Authority 2024 changes page; Pro, SLE, SLT, AT4, Denali, Denali Ultimate: O

  ⛭ GM factory document — 2025 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2027 gmc sierra 2500 hd retail and fleet fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 gmc sierra 3500 hd retail and fleet fleet order guide, p.33.

  ⛭ GM factory document — 2026 gmc sierra 3500 hd retail and fleet fleet order guide, p.33.

  ⛭ GM factory document — 2027 gmc sierra 3500 hd retail and fleet fleet order guide, p.32.

This page aggregates every documented appearance of Z6A in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.