2003 Gmc duramax diesel oil capacity Read Also: 2003 Gmc duramax oil capacity 2003 Gmc sierra 2500hd duramax diesel towing capacity 2003 Gmc duramax diesel for sale 2003 Gmc duramax diesel 2003 Gmc duramax diesel problems 2003 Gmc sierra 2500 duramax diesel