« Reply #3609 on: April 30, 2011, 08:24:56 PM »
I do not know how you can tell if the GMMP tune is actual installed or not, but I can tell you that your numbers are in line with a stock GXP. There are people on here running close to 300 rwhp without a GMPP tune.
John that was easy , When I had it installed i was pulling at least21 lb. boost and about 7100 RPM's Now its about 16-17 and only 6500 ish RPM's
« Last Edit: April 30, 2011, 10:20:20 PM by 1 LIL NDN »

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GMPPTune, seat belt loops, Magnaflow Exhaust, Turn signal Mod, K/N CAI, Sprint Booster, , Driveshaft tunnel Plate, New Wheels, 3rd lite cover-up, Painted Calibers & Decals, Cooler/Travel bag, ProBeam, Custom FuseBoxCover, Sound Deadening, PeddleCovers, Hidden license bracket, Center Console, DDM Tbolt clamp&IC pipes, WindRestrictor & Lightbar, WestersRaceTune, Hood & Trunk Lighting, "A" pillar & Gauges,HoosierGXP interrior lights,StunnerTag and Directional Mirrors,Hood&Body Graphics(Chief Pontiac) by Jack of Arts,dimming mirror w/temp&compass