B4Z ✓ Factory-verified

Cadillac · Regular Production Option

Performance Traction Management

Years 2025–26 Models 2 Factory citations 6

Query this via API →

Also documented for Chevrolet

Documented applications

CT4 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  only in: CT4-V and CT4-V Blackwing; all trims: S

  ⛭ GM factory document — 2025 cadillac ct4 v ct4 v blackwing fleet order guide, p.7.

  ⛭ GM factory document — 2026 cadillac ct4 v ct4 v blackwing fleet order guide, p.8.

CT5 — Alpha 2 (2020–2026) →

• 2025–2026 ✓ Factory-verified

  only in: CT5-V, CT5-V Blackwing; V-Series, V-Series Blackwing: S

  ⛭ GM factory document — 2025 cadillac ct5 v ct5 v blackwing 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 v ct5 v blackwing fleet order guide, p.8.

  ⛭ GM factory document — 2026 cadillac ct5 v ct5 v blackwing fleet order guide, p.10.

Related codes · mentioned in these notes

CT5SV

This page aggregates every documented appearance of B4Z in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.