i have heard of guys runnin all stock LBZ's except exhaust and IFS upgrades into the high 12's low 13's but with a tranny upgrade and lift pumps pull 12.7-12.8's in the quarter.that was on EX SB and CC SB with out a lift and big tires.
__________________ James
05 LLY Chevy LS E/C L/B DRW my older brothers truck now
2006 LBZ GMC SLE C/C S/B,sold the truck to my dad for a business truck
My Truck now,1987 Chevy 2500 350 tweaked,6" SuperLift,350 V8 bored 60 over,Elderbrock headers Cam and Titanium Rockers,750 Twin Pumped Holley Carb and some other goodies.crank dynos over 400HP.
'06 LBZ
18,000 miles to date
PPE hot +2 e.t (Jan 22,2008) sold on Jul 29,2008, EFILive (July 29,2008), egr block plate,pyrometer and boost gauges,Line-X bedliner, power step, matching door handles (Escalade), billet grille, clear braw to prevent rock chips, led tail lights, high intensity headlamps, two 10" subs, rockford fosgate 1000w amp for subs 5w-40 synthetic engine (Feb.17,2008), 75w-90 synthetic differentials (Feb.17, 2008), fuel additive (Feb.23, 2008)
__________________ 2006 Crew Cab SB 4x4, Stock LBZ, Black with Gray leather, Factory Steps. Black H2's with 295/70/17 Nitto Terra Grapplers, Magnaflow 5" SS turbo back, Diamond Eye Downpipe, SCIV and 1058(Fleece Performance), SC Case Brace, 68mm Cheetah, EFI Live, HP 150 lift pump, Auto meter gauges and pod, EGR Blocker and FRPV shim kit,
'03 GMC 2500HD LB7/Allison EC/SB 4x4 Dark Charcoal Metallic SLT. Injectors at 84,000. Sled Puller/DD EFI Live: V7.5.5/V8.1.2 OS:03904405 Suncoast IV w/1055
512rwhp 1085lb-ft
13.6 @ 99mph
Many mods to come over the winter.
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'06 duramax, 8" fabtech lift, dirt logic shocks, 24" akuza rims, 38" kuhmo tires, airaid intake, banks 6 gun, superchip, stage 4 trans by PATC, upgraded transfer case by merchant automotive, BD exhaust manifold, straight piped stacks 
ordered and in the mail ---> ARP head studs, EFI live, tts lift pumps, shim kit 
Linear Mode
