9C1 ✓ Factory-verified

GMC · Regular Production Option

Chassis package, police conversion

Years 2026 Models 2 Factory citations 2

Query this via API →

Also documented for Chevrolet

Documented applications

Yukon — T1XX (2021–2027) →

• 2026 ✓ Factory-verified

  listed in the 2026 body-builder list with its content lines

  ⛭ GM factory document — 2026 gmc yukon yukon xl electrical body builder manual service manual 2026 en us, p.4.

Yukon XL — T1XX (2021–2027) →

• 2026 ✓ Factory-verified

  listed in the 2026 body-builder list with its content lines

  ⛭ GM factory document — 2026 gmc yukon yukon xl electrical body builder manual service manual 2026 en us, p.4.

This page aggregates every documented appearance of 9C1 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.