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I just spoke with the service manager at the dealership about flashing the ECM with the Wester tune. Once that is done I will have it installed to see how the car runs. If it is ok, then I will know the tune was at fault, or the car just didn't like it for some reason. If it still runs crappy, then I know the ECM is faulty and I will have GM replace it. Will let you know how it goes...
Howster
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2007 GXP MEAN All the extras to include Auto.
SOLO Mach Shorty Exhaust, KW V3 Coilovers, SSR Type C RS wheels, Vredestein Sessanta 245/45/18 tires, DDM 4-Pot Calipers, DDM Pro Beam, DDM 3/8" Race Backbone Brace, DDM Slotted Front Rotors, Dejon Intercooler
Purchased 3/05/2008
NASSOA Founding Member
San Antonio, TX
Howster
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