Duramax Lifetime Supporter
Join Date: Oct 2016
Location: Maurice, LA
I don't have any ideas about your main problem but can tell you that the CAT filter is NOT a good idea unless you ave a Lift ump that incorporates a water separator.
Water in your diesel can ruin a diesel engine in short order.
2008 Silverado 2500HD CCSB LTZ Diesel
FASS 95 Lift Pump (with Baldwin filters), Edge Insight CTS Monitor on a Windshield Mount, Nicktane Fuel Filter Adapter w/ CAT 306-9199 UHE tertiary fuel filter, Bilstein 5100 Stock Height, Bushwacker Bed Rail Caps, AMP Research Bedstep, Fumoto oil drain valve, Dorman PS Oil cooler, Pioneer AVIC 7200NEX GPS/Stereo, Air Lift LoadLifter 5000 Air Bags.