- 2004–2009 Factory-verified
The 2004 list (cadillac/2004-cadillac-xlr-rpo-code-list.txt p.1) prints the code as "U 2U" with a space, which is where 2004 comes from; the 2005 to 2009 lists print U2U with "004" (2009: "4").
U2U Factory-verified
Documented applications
This page aggregates every documented appearance of U2U in the Cadillac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.