TTW ✓ Factory-verified

Cadillac · Regular Production Option

Headlamp control, automatic on/off

Years 2025–26 Models 3 Factory citations 14

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Also described as Headlamp control, automatic on/off with tunnel detection

Documented applications

CT4 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  Premium Luxury, Sport, V-Series, V-Series Blackwing: S

  ⛭ GM factory document — 2025 cadillac ct4 fleet order guide, p.4.

  ⛭ GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.5.

  ⛭ GM factory document — 2026 cadillac ct4 fleet order guide, p.5.

  ⛭ GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.5.

CT5 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  Premium Luxury, Sport: S; V-Series, V-Series Blackwing: S

  ⛭ GM factory document — 2025 cadillac ct5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac ct5 v ct5 v blackwing fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac ct5 fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide rpo codes, p.1.

  ⛭ GM factory document — 2025 cadillac ct5 fleet order guide, p.5.

  ⛭ GM factory document — 2026 cadillac ct5 fleet order guide, p.5.

  ⛭ GM factory document — 2025 cadillac ct5 v ct5 v blackwing fleet order guide, p.5.

  ⛭ GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide, p.7.

XT4 — E2 (2019–2025) →

• 2025 ✓ Factory-verified

  Premium Luxury, Sport: S

  ⛭ GM factory document — 2025 cadillac xt4 fleet order guide, p.5.

  ⛭ GM factory document — 2025 cadillac xt4 fleet order guide rpo codes, p.1.

Related codes · mentioned in these notes

SV

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