Duramax Lifetime Supporter
Join Date: Oct 2016
Location: Maurice, LA
Yes, and yes.
For all you know its loaded with a 200HP tune, i would get something else loaded on it, no you do not need the factory tune to flash, you can flash a delete tune over a delete tune without issue.
and that 200 HP tune can harm your transmission very easily costing you around $4000 to repair.
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.