| Make sure that you do not have an exhaust leak. Is the blocker plate new. I've heard of this happening with a leak at the blocker plate. This setup is a screamer though. The veins on the turbo adjust on the LBZ, resulting in the jet like sound. Enjoy!
__________________
-2007 Sierra Classic 2500HD 4x4, SLT CC LB SR, Silver Birch Metallic, LBZ/Allison, Toyo M55 265/75-R16 on PYOs, Putnam front and rear hitches (XDR Class V rear), Tekonsha Prodigy, Kargo Master Pro II HD, Jobox AL topside boxes, Supersprings 5K, Trippin in Yukon Sun Roof console, Z-Series Auto Meter Gauges, MBRP 4" Turbo Back, PPE Boost Controller, PPE Hot+2, PPE ABM, Blocked, Resonator Plugged, Cognito 2"-3" Leveling Kit, Bilsteins front and rear, Sulastics, (To install) Cognito PM & IA braces |