| it could be the injector harness going bad but IMO it sounds like an injector going bad.not all LB7's with bad injectors start hard or have reduced power but most of them have those symptons some just smoke and sound rough under a hard throttle..take it to another dealer and have them check the injectors to be sure.
__________________ James
I HAVE THE MEDAL  
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. |