i have a engine knock at around 3000 rpms and high dont do it at idle and also my secondaries dont open all the time and i have a 1998 SVT


1998 CSVT removed door ding strips fader window tint died June 30,03 reborn July 10,03 died again July 16,03 reborn again August 15,03 Died for good on 2-11-04 2000 GMC Sonoma