Cadillac XTS 2018 Owner's Manual page 325

324 SERVICE AND MAINTENANCE
Spark Plugs
3.6L (LF3)
3.6L (LFX)
Wiper Blades
Driver Side 65 cm (25.6 in)
Passenger Side 45 cm (17.7 in)
Part GM Part Number ACDelco Part Number
12662396
12622561
23368250
23353587
41-147
41-109