- 2003–2007 Factory-verified
UL4 Factory-verified
Also described as Frequencies, South AmericanFrequencies, South America
Also documented for CadillacChevrolet
Documented applications
- 2009 Factory-verified
- 2003–2007 Factory-verified
- 2007–2009 Factory-verified
- 2004–2006 Factory-verified
- 2009 Factory-verified
This page aggregates every documented appearance of UL4 in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.