Since you didnít mention what engine you have my response is for a 3126 or C7.
One way to assess your water pumps basic condition would be to take off the belt and check the water pump pulley for excessive play in all directions and smooth operation when rotating. Do the same for the belt tensioner pulley.
Treat the tensioner bolts with penetrating oil before trying to loosen and be gentle, you donít want to snap one of those bolts.
Here is a picture of both pulleys from below.
1 belt tensioner
2 water pump
02 Itasca Horizon 36LD, Cat 3126E, Allison MD3000MH
09 Colorado Z71 Ex Cab, SMI AF1, Demco Base Plate & Tow Bar.