Put a man size cam in it?
2006 SilveradoLittle Black Bitch
just listened to your exhaust clip, sounds like stock idle? post another when have the tune changed.
5.3 2wd upgrades: Nelson tune, stainless lt's, magnaflow, e-fans, msd's, cai.
well i got a retune on the way lowered the rpms a bit see if that helps.... im also prob gunna try to get a diffrent muffler as well
Built 2 Run! 6XX HP/ 6XX TQ