BOY ✓ Factory-verified

GMC · Regular Production Option

Vehicle interface, smartphone, uplevel, retail

Years 2026 Models 2 Factory citations 2

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Also documented for CadillacChevrolet

Documented applications

Yukon — T1XX (2021–2027) →

• 2026 ✓ Factory-verified
  ⛭ GM factory document — 2026 gmc yukon yukon xl electrical body builder manual service manual 2026 en us, p.5.

Yukon XL — T1XX (2021–2027) →

• 2026 ✓ Factory-verified
  ⛭ GM factory document — 2026 gmc yukon yukon xl electrical body builder manual service manual 2026 en us, p.5.

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