Package, merchandised, luxury edition

Years 1999–02 Models 1 Factory citations 4

Also documented for Buick Cadillac Chevrolet GMC Hummer Pontiac Saturn

Documented applications

Silhouette — U-body second generation (1997–2004)

1999–2002 Factory-verified

the 1999 list includes AP9, A20, C79, D32, IPC, K34 and UL0 or a radio upgrade

GM factory document — 1999 oldsmobile silhouette ext rpo code list, p.1.
GM factory document — 2000 oldsmobile silhouette ext rpo code list, p.1.
GM factory document — 2001 oldsmobile silhouette ext rpo code list, p.1.
GM factory document — 2002 oldsmobile silhouette ext rpo code list, p.1.

This page aggregates every documented appearance of Y91 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.