U03 ✓ Factory-verified

Cadillac · Regular Production Option

Horn, noise regulation

Years 1998–99, 2009 Models 5 Factory citations 7

Query this via API →

Also documented for BuickChevrolet

Documented applications

DeVille — K-body (1994–1999) →

• 1998–1999 ✓ Factory-verified
  ⛭ GM factory document — 1998 cadillac deville rpo code list, p.1.

  ⛭ GM factory document — 1999 cadillac deville rpo code list, p.1.

Eldorado — E-body (1992–2002) →

• 1998–1999 ✓ Factory-verified
  ⛭ GM factory document — 1998 cadillac eldorado rpo code list, p.1.

  ⛭ GM factory document — 1999 cadillac eldorado rpo code list, p.1.

Seville — G-body (1998–2004) →

• 1998 ✓ Factory-verified
  ⛭ GM factory document — 1998 cadillac seville rpo code list, p.1.

SRX — Sigma / GMT265 (2004–2009) →

• 2009 ✓ Factory-verified
  ⛭ GM factory document — 2009 cadillac srx rpo code list, p.1.

STS — Sigma (2005–2011) →

• 2009 ✓ Factory-verified
  ⛭ GM factory document — 2009 cadillac sts rpo code list, p.1.

This page aggregates every documented appearance of U03 in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.