G99 ✓ Factory-verified

Cadillac · Regular Production Option

Axle, electronic positraction, twin-clutch, Sport Control all-wheel drive

Years 2025–26 Models 2 Factory citations 8

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Also described as Axle, electronic Positraction

Also documented for BuickChevroletGMC

Documented applications

XT5 — C1XX (2017–2026) →

• 2025–2026 ✓ Factory-verified

  Sport: S; Luxury, Premium Luxury: not available

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.7.

  ⛭ GM factory document — 2025 cadillac xt5 fleet order guide, p.33.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.9.

  ⛭ GM factory document — 2026 cadillac xt5 fleet order guide, p.34.

XT6 — C1XX (2020–2025) →

• 2025 ✓ Factory-verified

  Sport: S

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.7.

  ⛭ GM factory document — 2025 cadillac xt6 fleet order guide, p.62.

Related codes · mentioned in these notes

S

This page aggregates every documented appearance of G99 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.