Thanks for your reply, NWAcadia. When I tried the windshield wiper spray today, the driver side nozzle still didn't work at all, and the left side nozzle just sprayed about 3"-5", hardly hitting the windshield. Looks like I have to work on both nozzles. Do you think that I'll be able to change both nozzles if I buy two replacement nozzle parts from the GM dealership? I'm not very mechanically oriented but if it's an easy matter, maybe I'll attempt it. If I can't do it, think I'm better off going to a local car mechanic to do the work instead of the GM dealership (i.e., will it cost me less to go to the local car mechanic)? Thanks!