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		Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 06-07.5 LBZ & LLY Forums > 06-07.5 LBZ & LLY Performance Parts Discussion
Screeching sound at about 3500 rpms

06-07.5 LBZ & LLY Performance Parts Discussion Discussion of Performance Parts For the 06-07.5 LBZ/LLY Duramax Trucks No Advertising

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06-27-2008, 08:12 PM	eBay Motors #11 (permalink)
Kingston Junior Member Join Date: Dec 2006 Posts: 10	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

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07-17-2008, 09:42 PM	eBay Motors #12 (permalink)
mattfromwy Duramax Forum Supporter Join Date: Jul 2008 Location: Sheridan, WY Posts: 156	My truck sounds the same way. It always sounds like the tires are spinning when Im on it, thats taking a long time to get used to, but gotta love the wicked sound of a jet airplane. __________________ 2004 GMC 2500HD LLY Edge Juice with Attuide Crank it up Tierod sleeves Turbo Resinator Plugged 4" Turbo Back Exhaust System dead kitty lost muffler (MBRP) 6'' Rancho Lift 17" Procomp Rims 35x12.50 Cooper STT Tinted Windows Spray In Bedliner, also on the bottom 6'' of truck Custom Built Grill Guard, Bolinger Inc. Buffalo,WY 82834

09-04-2008, 05:37 PM	eBay Motors #13 (permalink)
DMax07LBZ Duramax Forum Supporter Join Date: Aug 2008 Location: Pomona, California Posts: 65	whats the purpose of the pvc reroute? __________________ 2007 Silverado Duramax LBZ Crew Cab Escalade handles, Bedrug, Painted bumpers and mirrors, 5% Tint All around, 20% Tint on Windshield, Smoked Tail lights and 3rd Brakelight 2 Fosgate Shallow Mount Sub's, Alpine IVA-505, Diamond Audio Components, 2 TUNN 1,300 watt Amps, 6 Tv's Total RBP Turbo Back Exhaust. Edge Juice with Attitude, Trueflow XDI Air Intake, Resignator Plug Clifford SST 2-Way Alarm with GPS Tracking & Remote Start, H.I.D Headlights Pro Comp Level Kit, Bilsetin 5100 Shocks All Around Helo Max Wheels Black, 33inch Mickey Thompson Baja Claw Radial

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