Cadillac CTS engines / models – timing belt or chain?

Generations

Cadillac CTS Typ A1LL (2013 – 2019) 3th generation

Cadillac CTS Typ GMX322 (2008 – 2013) 2th generation

Cadillac CTS Typ GMX320 (2003–2007) 1th generation

Related: Cadillac / All car maker