According to this link it is NOT. http://www.motorwatch.com/automotivebible/auto_motive_bible/TimingBelts.pdf "Bjorn Sunde" <bjornsunde@[EMAIL PROTECTED] > wrote in message news:AbLxj.42972$FO1.4403@[EMAIL PROTECTED] > Is the 3.4 V6 engine in the 03 Alero an interference engine or not? > > Thanks >