2004 Chevrolet Express 3500 Cargo

2004 Chevy Express Cargo van. 6.0 litre engine, roof ladder rack combo with pipe box. Shelving throughout, front cab storage. Van runs fine but needs a few things. It got broken into so the locks all need to be replaced as they got punched out. Engine burns a bit of oil and coolant. Battery dies if not driven for a day or so. It has a small drain