- 2003–2009 Factory-verified
the 2003–2005 lists add Hummer H2.
R13 Factory-verified
Also documented for BuickChevroletGMCPontiacSaturn
Documented applications
- 2006–2009 Factory-verified
This page aggregates every documented appearance of R13 in the Hummer reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.