X2 
I don't know what the difference is but my entire family had better luck with GMC's than Chevrolet's. I guess that it just how it plays out.
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2006 GMC 2500HD LBZ Crew Cab 4x4, Silverline Turbo Back Dual Exhaust, PPE Hot Programmer, Egr Block Plate, PPE Air Box Mod, 2in. Plug, SES Light
Full Bore Exhaust Manifold compliments of BD Diesel. |