| YES! This is the DPF getting fuel dumped in before and after the filter to burn off soot build up.
Time to get a DPF delete exhaust system and programmer. It will suck down 1 or more gallons depending on buildup and/or if its running when in town or on highway.
__________________  08 Chevy Silverado 2500HD Crew 4x4 
6" Fabtech
35" Pro Comp Extreme A/Ts
17" Pro Comp Alloys
ATS Extreme Trans w/CoPilot
Quadzilla Stealth 2
4" Silverline System
BD-Performance Exhaust Manifold
Kennedy Diesel Air box Mod & Resonator plug
6k/8k HID Headlight Upgrade |