2003 GAGT. humming sound [Archive] - GrandAmGT.com Forum GrandAmGT.com Forum > GAGT - Technical - Sponsored by www.MilzyMotorSports.com > Technical Q&A > 2003 GAGT. humming sound PDA View Full Version : 2003 GAGT. humming sound handog771671410-01-2012, 01:31 PMas my 2003 Grand am GT accelerates a humming sound is heard. as it goes faster the huming gets louder? any ideas what it is and how to fix it? vBulletin® v3.7.2, Copyright ©2000-2018, Jelsoft Enterprises Ltd.