Yea grab a used oem one anything besides oem seem to never work right
I've had OK luck with the Cardone Reman MAFs, but I believe those are just OEM MAFs that have the solder joints fixed. Might be another good option to look into. I have used 3 and all seemed to work great.
2003 Grand Prix GTP.... the journey begins again....
E85 Self Tune with HPT, 80# Injectors, Gen V 3.4 pulley, SD Headers, AL605 Plugs