Duramax Lifetime Supporter
Join Date: Oct 2016
Location: Maurice, LA
What plugs are you putting in the truck?
Also take your truck and have both batteries load tested. They have to be disconnected and tested separately.
There seems to be a correlation between batteries getting low and GPs failing. If either battery is low, replace them BOTH!
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.
Last edited by 407driver; 01-18-2020 at 10:27 AM.