- 1998–2000 Factory-verified
the 1999–2000 lists print "Colth"
13C Factory-verified
Also documented for CadillacChevroletPontiac
Documented applications
- 1998–1999 Factory-verified
GM prints "Colth"
- 1998–1999 Factory-verified
GM prints "Colth"
This page aggregates every documented appearance of 13C in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.