04 colorado

code p0171 lean? has new mas air flow, cleaned t- boby,& injectors. has no vac leaks,new fuel,filter,and good presure. pulls long term trim to 22.5. im thinking front o2? any other ideas?

First off, what engine do you have? and has it thrown a o2 code? after replacing all of those things have you tried deleting the Trouble codes and seeing if they come back on? sometimes they will stay on until the computer learns that the problem is fixed.