Duramax Lifetime Supporter
Join Date: Oct 2016
Location: Maurice, LA
I had an issue with my GPCM, kept throwing a code saying it could not communicate with ECM (P067C). I had to take it to the dealer to have it programmed after replacing it.
The small issue I had is that after he got the balance rates all the same,the CEL was still there with an error code say ing the rates were not correct. The tech told me he had erased the history completely.
I took it home, pulled both Neg battery cables and left them off 30 minutes. When I reconnected them the codes were gone. Apparently he didn't get them all erased.
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.