Silverado 2010 the guy that tuned it i really dont think he knew much about the e38 i think he had been doing older trucks and we made like 3 hits and 45min he was done im trying myself but dont know that much about it ive got a ballenger wideband 500c lucas tune keep going back to.hpt24-04-07 18-40-42.hpl i just wanted a good tuner to give me some advice the motor 5.3 bored 30 over dod vvt deleted and a comp cam grid#gm g3 xfi 260 hr15 valve lift .513 .520 duration.006 259 265 valve timing .050 open int8.0 exh45.0 close btdc34.0abdc bbdc13.0-atdc lobe separation 115.00