Tire brand, all, Goodyear

Years 1999–00, 2002, 2004–06 Models 4 Factory citations 7

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Also documented for Chevrolet GMC

Documented applications

Escalade EXT — GMT800 (2002–2006)

2002, 2004–2006 Factory-verified

GM factory document — 2002 cadillac escalade ext rpo code list, p.1.
GM factory document — 2006 cadillac escalade ext rpo code list, p.1.

Escalade — GMT400-based, GMT435 (1999–2000)

1999–2000 Factory-verified

GM factory document — 1999 cadillac escalade rpo code list, p.1.
GM factory document — 2000 cadillac escalade rpo code list, p.1.

Escalade — GMT800 (2002–2006)

2002, 2004–2006 Factory-verified

GM factory document — 2002 cadillac escalade 2wd rpo code list, p.1.
GM factory document — 2006 cadillac escalade rpo code list, p.1.

XLR — Y-body (2004–2009)

2006 Factory-verified

GM factory document — 2006 cadillac xlr rpo code list, p.1.

This page aggregates every documented appearance of R4Y in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.