Ever plug it in a night? Sounds like your loosing prime somewhere. Check your fuel filter and filter housing. Two places where a leak could be due to o-ring failing.
Justin 2001 LB7 Silverado 2500HD LT CCSB 4x4.
EFI Live by Idaho Rob, 429K+ and rolling, Undercover Bed Cover, Vortex spray in bed liner, Westin steps, Bilstein Shocks, Road Master Active Suspension, M/A Pump Rub Kit, PPE Trans Cooler, MBRP 5" Exhaust, Edge Insight CTS, K&N drop in filter, AirDog II 100 w/ CAT 751, LLY FF Housing w/ Racor, Running on LMM Blacked out Wheels & Michelin LTX M/S2 tires.
ADRENALINE TRUCK PERFORMANCE
Lincoln Diesel Specialties