GMC 2013 Terrain Owner's Manual page 314

11-14 Service and Maintenance
Spark Plugs
2.4L L4 Engine
3.6L V6 Engine
Wiper Blades
Driver Side 60 cm (23.6 in)
Passenger Side 42.5 cm (16.7 in)
Rear 32.5 cm (12.8 in)
Part
I n f o r ma t i o n P r o v i d e d b y :
GM Part Number ACDelco Part Number
12620540
12622561
22868413
22868414
20999459
41-108
41-109