Description: 2008 GMC Sierra 3500HD Crew Cab 4WD powered by a 6.6L Duramax diesel engine and an automatic transmission. Runs and drives with 376,046 miles.
The CEL is on (P0128, P0401, P0673, P0674, P0676, P0677). The left rear door won't open from the outside. There is an oil leak (unknown source). The batteries need to be charged/replaced. Additional details shown in the photos.