Trying to narrow issue down, checked canister and leads nothing seems amiss, any help appreciated; p0443 says - evap emission control system purge valve c fault; p1441 says- manuf control aux emission controls

Welcome to AF. Points to cannister purge solenoid which has been problematic for lots of GM cars. see this link.http://service.gm.com/gmspo/mode6/pdf/2000/2000file8.pdf

yea I replaced one of those on an 02 buick. Seemed like it had similar codes.